Patent Date Title Inventor Assignee
1788007January 6, 1931Telephone repeater systemABBOTT HENRY H ; ENTZ FERDINAND SAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
1787688January 6, 1931Telephone systemTHEODOR KORTHAUERAMERICAN TELEPHONE & TELEGRAPH
1787552January 6, 1931Filing cabinetRICE JOHN SAMERICAN TELEPHONE & TELEGRAPH
1787511January 6, 1931Patching arrangement for carrier telegraph circuitsCLAPP ROBERT HAMERICAN TELEPHONE & TELEGRAPH
1787508January 6, 1931Signaling systemBULLOCH HAROLD DAMERICAN TELEPHONE & TELEGRAPH
1788472January 13, 1931Light-valve-adjusting meansREYNOLDS FREDERICK WAMERICAN TELEPHONE & TELEGRAPH
1788470January 13, 1931Electrooptical systemHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1789419January 20, 1931Radio receiving systemSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1789416January 20, 1931Neutralized vacuum-tube circuitsPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1789399January 20, 1931Earth augerHERMAN BARTENBACH ; SPOWART JOHN BAMERICAN TELEPHONE & TELEGRAPH
1790079January 27, 1931System for measuring delayed-current effectsSILENT HAROLD CAMERICAN TELEPHONE & TELEGRAPH
1790076January 27, 1931Automatic voltage-regulating circuitSCHRAMM FRED WAMERICAN TELEPHONE & TELEGRAPH
1790069January 27, 1931Designation labelNEEB LAWRENCE SAMERICAN TELEPHONE & TELEGRAPH
1791587February 10, 1931Printing-telegraph systemVERNAM GILBERT SAMERICAN TELEPHONE & TELEGRAPH
1791579February 10, 1931Telegraph signaling systemSINGER FRED JAMERICAN TELEPHONE & TELEGRAPH
1791578February 10, 1931Telegraph receiving systemSINGER FRED JAMERICAN TELEPHONE & TELEGRAPH
1791577February 10, 1931Telegraph receiving systemSINGER FRED JAMERICAN TELEPHONE & TELEGRAPH
1792600February 17, 1931Radio signaling systemOHL RUSSELL SAMERICAN TELEPHONE & TELEGRAPH
1792579February 17, 1931Telephone circuitEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1792523February 17, 1931Phase-shifting networkZOBEL OTTO J.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1793598February 24, 1931Telephone systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1793588February 24, 1931Measuring and monitoring circuits for telephone linesCOWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
1793582February 24, 1931Telephone systemBAILEY RAND S ; NELSON STANLEY F ; SHIPLEY FRANK FAMERICAN TELEPHONE & TELEGRAPH
1795204March 3, 1931Electrical wave filterLLOYD ESPENSCHIEDAMERICAN TELEPHONE & TELEGRAPH
1794889March 3, 1931Multiplex systemFETTER CHARLES H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1794847March 3, 1931Frequency eliminatorGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1794418March 3, 1931Radio receiving circuitPOTTER RALPH KIMBALLAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1794393March 3, 1931Transmission-measuring apparatusRALPH BOWN ; POTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1795397March 10, 1931Directionally-selective radio receiving systemHOYT RAY SAMERICAN TELEPHONE & TELEGRAPH
1795393March 10, 1931Reduction of interferenceJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1795389March 10, 1931Selective ringing systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1796497March 17, 1931Rectifying arrangementALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1796496March 17, 1931Book holderVOLKMAR WILLIAM AAMERICAN TELEPHONE & TELEGRAPH
1796486March 17, 1931Amplifier for short electric wavesSOUTHWORTH GEORGE CAMERICAN TELEPHONE & TELEGRAPH
1797365March 24, 1931Wire supportPUTNAM HOWARD PAMERICAN TELEPHONE & TELEGRAPH
1797337March 24, 1931Connecting pinFREEMAN ALBERT EAMERICAN TELEPHONE & TELEGRAPH
1797317March 24, 1931Binaural phase-discrimination radio systemSMART BRAND ; PIERRE MERTZAMERICAN TELEPHONE & TELEGRAPH
1798235March 31, 1931Printing-telegraph switching systemVERNAM GILBERT SAMERICAN TELEPHONE & TELEGRAPH
1798202March 31, 1931Relay arrangement for use with voice-operated devicesJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1799679April 7, 1931Telephone-exchange systemDUNHAM BERT G ; FAIRBAIRN RHYS ABELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
1799188April 7, 1931Cross-talk reductionWEAVER MYRON AAMERICAN TELEPHONE & TELEGRAPH
1799174April 7, 1931Protective deviceLOYE DONALD PAMERICAN TELEPHONE & TELEGRAPH
1799159April 7, 1931Multiple-modulation systemLLOYD ESPENSCHIEDAMERICAN TELEPHONE & TELEGRAPH
1800305April 14, 1931Relay-regulating circuitsLINDSAY RUSSELL HAMERICAN TELEPHONE & TELEGRAPH
1800304April 14, 1931Relay-regulating circuitsLINDSAY RUSSELL HAMERICAN TELEPHONE & TELEGRAPH
1800303April 14, 1931Automatic regulating arrangementLINDSAY RUSSELL HAMERICAN TELEPHONE & TELEGRAPH
1801380April 21, 1931Signaling systemVERNAM GILBERT SAMERICAN TELEPHONE & TELEGRAPH
1801342April 21, 1931Electrical networkGANNETT DANFORTH K. ; KIRKWOOD MACLEANAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1802446April 28, 1931Telephone systemSCHNECKLOTH HARRY HAMERICAN TELEPHONE & TELEGRAPH
1802420April 28, 1931Method of utilizing a wide frequency range for signaling channelsGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1802419April 28, 1931Gear mechanismFREEMAN ALBERT E ; LIVERMORE WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1803466May 5, 1931Ticket-distributing systemDREW GEORGE AAMERICAN TELEPHONE & TELEGRAPH
1803454May 5, 1931System for communicating with moving vehiclesAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1803453May 5, 1931System for communicating with moving vehiclesAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1804548May 12, 1931Telegraph exchange systemVERNAM GILBERT SAMERICAN TELEPHONE & TELEGRAPH
1804547May 12, 1931Telegraph repeater arrangementSHANCK ROY BAMERICAN TELEPHONE & TELEGRAPH
1804526May 12, 1931Radio receiving circuitCOXHEAD HARRY BAMERICAN TELEPHONE & TELEGRAPH
1805596May 19, 1931Signaling systemPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1805594May 19, 1931Communicating systemPAPKER RALZEMOND DAMERICAN TELEPHONE & TELEGRAPH
1805591May 19, 1931Signaling systemOHL RUSSELL S.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1808869June 9, 1931Directional antenna arraySTONE JOHN STONEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1808868June 9, 1931Directional antenna arraySTONE JOHN STONEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1808867June 9, 1931Directional antenna arraySTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1809950June 16, 1931Carrier telegraph systemTHORP VAUGHN PAMERICAN TELEPHONE & TELEGRAPH
1809945June 16, 1931Control arrangement for carrier apparatusREA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1809925June 16, 1931Variable resistance deviceEDWARDS WILLIAM H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1811025June 23, 1931Regulation of level in broadcast transmissionPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1811024June 23, 1931Photo-electric tubePOTTER RALPH K.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1811023June 23, 1931Photo-electric cellPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1811955June 30, 1931Transmission volume controlDOREN MITCHELL ; SILENT HAROLD CAMERICAN TELEPHONE & TELEGRAPH
1811954June 30, 1931Transmission volume controlDOREN MITCHELL ; SILENT HAROLD CAMERICAN TELEPHONE & TELEGRAPH
1811915June 30, 1931Means to control cross talkALLEN CARPEAMERICAN TELEPHONE & TELEGRAPH
1811905June 30, 1931Means to control cross talkAFFEL HERMAN A ; ALLEN CARPEAMERICAN TELEPHONE & TELEGRAPH
1812977July 7, 1931Oscillation generatorOHL RUSSELL SAMERICAN TELEPHONE & TELEGRAPH
1812964July 7, 1931Calling dialLABAUGH JAMES M ; MILLER VICTOR FAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
1812961July 7, 1931Cable guideKENT ROBERT JAMERICAN TELEPHONE & TELEGRAPH
1814987July 14, 1931Picture transmitting systemWEAVER ALLAN ; BRANSON DAVID ERNESTAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1814956July 14, 1931Radio signaling systemOHL RUSSELL SAMERICAN TELEPHONE & TELEGRAPH
1814898July 14, 1931Measuring systemDEARDORFF RALPH WAMERICAN TELEPHONE & TELEGRAPH
1814158July 14, 1931Signaling systemHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1814052July 14, 1931Echo suppressorDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
1814038July 14, 1931Echo suppressorJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1814018July 14, 1931Means for controlling sensitivity of voice operated devicesWRIGHT SUMNER B ; DOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
1814017July 14, 1931Means for controlling sensitivity of voice operated devicesWRIGHT SUMNER B ; DOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
1815256July 21, 1931Series type impedance equalizer for any smooth lineHOYT RAY SAMERICAN TELEPHONE & TELEGRAPH
1815255July 21, 1931Impedance equalizer for any smooth lineHOYT RAY SAMERICAN TELEPHONE & TELEGRAPH
1815254July 21, 1931Shunt type impedance equalizer for any smooth lineHOYT RAY SAMERICAN TELEPHONE & TELEGRAPH
1815241July 21, 1931Transmission systemGEORGE CRISSONAMERICAN TELEPHONE & TELEGRAPH
1816634July 28, 1931Telephone exchange systemCARPENTER WARREN W ; DAHL JACK F ; DAVIS RICHARD C ; KITTREDGE LINUS EBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
1815996July 28, 1931Telegraph reading machineALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1815986July 28, 1931Telegraph reading machinePARKER RALZEMOND DAMERICAN TELEPHONE & TELEGRAPH
1815976July 28, 1931Coupling between carrier and transmission linesGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1816967August 4, 1931Telephone systemGREEN IRVING WAMERICAN TELEPHONE & TELEGRAPH
1816958August 4, 1931Transmission measuring systemCLARK ALVA B. ; BEST FRED H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1816953August 4, 1931Privacy signaling systemRALPH BOWNAMERICAN TELEPHONE & TELEGRAPH
1818064August 11, 1931Telephone systemJOHNSON HERBERT B ; VON NOSTITZ ERICHBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
1818027August 11, 1931Concentric conductor systemAFFEL HERMAN A ; GREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1817964August 11, 1931Concentric conductor transmission systemCARSON JOHN R ; MEAD SALLIE PAMERICAN TELEPHONE & TELEGRAPH
1817949August 11, 1931Snatch blockSMITH TEMPLE CAMERICAN TELEPHONE & TELEGRAPH
1819083August 18, 1931Phonograph reproducerEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1819069August 18, 1931Static frequency changerBONELL RALPH KAMERICAN TELEPHONE & TELEGRAPH
1819054August 18, 1931Carrier signaling systemAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1820116August 25, 1931Testing systemBURNS ROY WAMERICAN TELEPHONE & TELEGRAPH
1820094August 25, 1931Winch rope winderSMITH TEMPLE C ; SPOWART JOHN B ; FITZPATRICK PAUL GAMERICAN TELEPHONE & TELEGRAPH
1820088August 25, 1931Recording apparatusPARKER RALZEMOND D ; BEST FRED HAMERICAN TELEPHONE & TELEGRAPH
1821279September 1, 1931BookholderSITHENS EDWARD JAMERICAN TELEPHONE & TELEGRAPH
1821006September 1, 1931Measurement of negative resistanceGEORGE CRISSONAMERICAN TELEPHONE & TELEGRAPH
1821005September 1, 1931Gain measuring apparatusCOWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
1821004September 1, 1931Compression of frequency rangeALLEN CARPEAMERICAN TELEPHONE & TELEGRAPH
1821997September 8, 1931Compression of frequency rangeWINTRINGHAM WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1821993September 8, 1931Telephone systemALBERT TRADUPAMERICAN TELEPHONE & TELEGRAPH
1821928September 8, 1931Telephone echo suppressorCLARK ALVA BAMERICAN TELEPHONE & TELEGRAPH
1823948September 22, 1931Radio telephone and telegraph systemMCCANN THOMAS AAMERICAN TELEPHONE & TELEGRAPH
1823944September 22, 1931Time recordingKITTREDGE LINUS E ; DORFF LOUIS AAMERICAN TELEPHONE & TELEGRAPH
1824829September 29, 1931Cable testing systemMCCURDY RALPH GAMERICAN TELEPHONE & TELEGRAPH
1824827September 29, 1931Radio signaling systemMARTIN DE LOSS KAMERICAN TELEPHONE & TELEGRAPH
1824802September 29, 1931Insulation testing systemBREHMAN LUTHER WAMERICAN TELEPHONE & TELEGRAPH
1824801September 29, 1931Electrical potentiometerBOUTON LEWIS LAMERICAN TELEPHONE & TELEGRAPH
1826196October 6, 1931Echo suppressorABRAHAM LEONARD GAMERICAN TELEPHONE & TELEGRAPH
1825723October 6, 1931Telephone systemFRIEND OTTO A ; HEITSMITH WILLIAM JAMERICAN TELEPHONE & TELEGRAPH
1825715October 6, 1931Telegraph transmission measuring systemCORY SAMUEL IAMERICAN TELEPHONE & TELEGRAPH
1826812October 13, 1931Electrooptical transmissionHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1826717October 13, 1931Dispensing deviceBARTENBACH HERMANAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1827860October 20, 1931Carrier telegraph systemTHORP VAUGHN PAMERICAN TELEPHONE & TELEGRAPH
1827855October 20, 1931Reeling devicePARKER LEE TAMERICAN TELEPHONE & TELEGRAPH
1827843October 20, 1931Piezo electric frequency eliminatorGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1829185October 27, 1931Method and means for measuring distortion of telegraph signalsJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1828823October 27, 1931Combined telephone and telegraph systemTAYLOR EDMUND RAMERICAN TELEPHONE & TELEGRAPH
1828803October 27, 1931Multiple drive apparatusFREEMAN ALBERT E ; LIVERMORE WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1829838November 3, 1931Transmission delay measuring systemHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1829837November 3, 1931Signaling systemNEWBY NEAL DAMERICAN TELEPHONE & TELEGRAPH
1829836November 3, 1931Signaling systemNEWBY NEAL DAMERICAN TELEPHONE & TELEGRAPH
1829830November 3, 1931Pilot channel for telegraph systemsJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1829825November 3, 1931Brake for power driven shaftsFREEMAN ALBERT E ; LIVERMORE WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1830896November 10, 1931Adjustable electric filter systemWINTRINGHAM WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1830880November 10, 1931Antenna circuitMISENHEIMER HARVEY NAMERICAN TELEPHONE & TELEGRAPH
1830873November 10, 1931Telephone systemHAINES WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1830864November 10, 1931Elimination of radio interference due to printing telegraphALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1830834November 10, 1931Telephone systemGREEN IRVING WAMERICAN TELEPHONE & TELEGRAPH
1831931November 17, 1931Telephone systemSTERN ARTHUR BAMERICAN TELEPHONE & TELEGRAPH
1831922November 17, 1931Telephone exchange systemMCDAVITT MARCELLUS B ; SCHWANTES JR PAUL CAMERICAN TELEPHONE & TELEGRAPH
1831921November 17, 1931Short wave radio antenna systemMARTIN DE LOSS KAMERICAN TELEPHONE & TELEGRAPH
1831901November 17, 1931Telephone systemBASCOM HENRY MAMERICAN TELEPHONE & TELEGRAPH
1831881November 17, 1931Radio signal measuring devicePOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1833000November 24, 1931Selective signaling systemSHAFER WILLIAM LAMERICAN TELEPHONE & TELEGRAPH
1832996November 24, 1931Grade clampPERCIVAL HARRY S ; BARTLETT HENRY HAMERICAN TELEPHONE & TELEGRAPH
1832981November 24, 1931System for building out loading sections of signaling cablesHAISLIP RICHARD AAMERICAN TELEPHONE & TELEGRAPH
1832977November 24, 1931Multiple way connection for a plurality of linesGANNETT DANFORTH KAMERICAN TELEPHONE & TELEGRAPH
1832969November 24, 1931Testing systemEDWARDS PAUL G. ; HERRINGTON HAROLD W.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1834005December 1, 1931Selective circuit arrangementROBERTS LELAND CAMERICAN TELEPHONE & TELEGRAPH
1834002December 1, 1931Distortion neutralizing repeaterNYQUIST HARRYAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1833968December 1, 1931Amplifying systemHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1833966December 1, 1931Multiplex systemFETTER CHARLES HAMERICAN TELEPHONE & TELEGRAPH
1833958December 1, 1931Telegraph signal recording systemWATSON EDWARD F ; MCCANN THOMAS AAMERICAN TELEPHONE & TELEGRAPH
1835099December 8, 1931Valve commutator and its use in multiplex signalingSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1835080December 8, 1931Transmission regulation in cable circuitsPFLEGER KENNETH WAMERICAN TELEPHONE & TELEGRAPH
1835031December 8, 1931Concentric conducting systemLLOYD ESPENSCHIED ; AFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1835003December 8, 1931Telephone systemBISBEE FREDERICK CAMERICAN TELEPHONE & TELEGRAPH
1834992December 8, 1931Device for producing modulated currentsALMQUIST MILTON LAMERICAN TELEPHONE & TELEGRAPH
1836129December 15, 1931Signaling systemPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1836127December 15, 1931System for testing and adjusting energy levels in the transmission of signalsMATTE ANDREW LAMERICAN TELEPHONE & TELEGRAPH
1836114December 15, 1931System of carrier current signaling on power linesGREEN ESTILL LAMERICAN TELEPHONE & TELEGRAPH
1836109December 15, 1931Impedance modifying deviceEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1836106December 15, 1931Overflow jack circuitBROE EDGAR PAMERICAN TELEPHONE & TELEGRAPH
1837337December 22, 1931Means for producing current of reduced frequencyROBERTS LELAND CAMERICAN TELEPHONE & TELEGRAPH
1837327December 22, 1931Transmission networkLEWIS BENJAMIN FAMERICAN TELEPHONE & TELEGRAPH
1837316December 22, 1931Voice operated control arrangement for telephone cable systemsGEORGE CRISSON ; WRIGHT SUMNER BAMERICAN TELEPHONE & TELEGRAPH
1838281December 29, 1931Transmission lineHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1838278December 29, 1931Spanner wrenchJULE MONTAGNONAMERICAN TELEPHONE & TELEGRAPH
1838268December 29, 1931Biased carrier telegraph systemHENRY LADNER ; VINCENT WELCH PAULAMERICAN TELEPHONE & TELEGRAPH
1839361January 5, 1932Image producing systemALLAN WEAVER ; BRANSON DAVID EAMERICAN TELEPHONE & TELEGRAPH
1839321January 5, 1932Reeling deviceKENT ROBERT JAMERICAN TELEPHONE & TELEGRAPH
1839320January 5, 1932Cable reel trailerKELLEMS EDGAR EAMERICAN TELEPHONE & TELEGRAPH
1839290January 5, 1932Direction finder for radiowavesAUSTIN BAILEYAMERICAN TELEPHONE & TELEGRAPH
1840434January 12, 1932Conductor system for signaling currentsCOWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
1840362January 12, 1932Transposition bracket for insulatorsHUNTER RUSSELL N ; STOVER HERBERT FAMERICAN TELEPHONE & TELEGRAPH
1840360January 12, 1932Selective circuit arrangementJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1841479January 19, 1932Combined cable and wire supportJESSEN GEORGE J.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1841473January 19, 1932Arrangement for connecting or terminating coaxial conductorsGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1841428January 19, 1932Contact mechanismBARROWS LEON DAMERICAN TELEPHONE & TELEGRAPH
1842523January 26, 1932Telegraph systemHANLEY FRANK HAMERICAN TELEPHONE & TELEGRAPH
1842496January 26, 1932Mounting for books and the likeWAGNER JR RICHARDAMERICAN TELEPHONE & TELEGRAPH
1842478January 26, 1932Telegraph systemREA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1843228February 2, 1932Radio telephone and telegraph circuitsJOSEPH HERMAN ; TAYLOR EDMUND R ; WRIGHT SUMNER BAMERICAN TELEPHONE & TELEGRAPH
1843227February 2, 1932Radio telephone and telegraph systemJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1843189February 2, 1932Radio telephone and telegraph systemAUSTIN BAILEYAMERICAN TELEPHONE & TELEGRAPH
1844887February 9, 1932Method of and means for measuring time of propagation of wave fronts over circuitsJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1844886February 9, 1932Means for measuring time of propagation of wave fronts over circuitsJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1845081February 16, 1932Electrical protective systemFERRIS LIVINGSTON PAMERICAN TELEPHONE & TELEGRAPH
1845034February 16, 1932Signaling apparatus for recording systemsBICKELHAUPT CARROLL OAMERICAN TELEPHONE & TELEGRAPH
1845017February 16, 1932Telephone signaling systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1846516February 23, 1932Telephone systemHAINES WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1846262February 23, 1932Telephone systemKITTREDGE LINUS EAMERICAN TELEPHONE & TELEGRAPH
1846261February 23, 1932Telephone systemKITTREDGE LINUS EAMERICAN TELEPHONE & TELEGRAPH
1847151March 1, 1932Transmitter of variably biased impulsesWATSON EDWARD F ; HUNT ARTHUR EAMERICAN TELEPHONE & TELEGRAPH
1847116March 1, 1932Telephone substation setLABAUGH JAMES MAMERICAN TELEPHONE & TELEGRAPH
1848222March 8, 1932Producing musical soundsPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1848221March 8, 1932Filter arrangementMCCURDY RALPH GAMERICAN TELEPHONE & TELEGRAPH
1848220March 8, 1932Energy control arrangementLINDSAY RUSSELL HAMERICAN TELEPHONE & TELEGRAPH
1849193March 15, 1932Submarine cableMCCURDY RALPH GAMERICAN TELEPHONE & TELEGRAPH
1849189March 15, 1932Gain control apparatusHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1849141March 15, 1932Transmission regulator systemDUTTON THOMAS DAMERICAN TELEPHONE & TELEGRAPH
1850146March 22, 1932Electrical wave filterZOBEL OTTO JAMERICAN TELEPHONE & TELEGRAPH
1850145March 22, 1932Carrier telegraph systemTHORP VAUGHN PAMERICAN TELEPHONE & TELEGRAPH
1850130March 22, 1932Talking moving picture systemGANNETT DANFORTH KAMERICAN TELEPHONE & TELEGRAPH
1851092March 29, 1932Transmission delay circuitsFETTER CHARLES H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1851091March 29, 1932Signaling system including adjustable wave filterFETTER CHARLES HAMERICAN TELEPHONE & TELEGRAPH
1851090March 29, 1932Transmission delay circuitsFETTER CHARLES HAMERICAN TELEPHONE & TELEGRAPH
1851072March 29, 1932Apparatus and method for electrical transmission of picturesVERNAM GILBERT S ; WATSON EDWARD F ; PERRY DONALD BAMERICAN TELEPHONE & TELEGRAPH
1852051April 5, 1932Telegraph repeater systemHAMILTON BAXTER P ; REA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1852050April 5, 1932Telegraph systemHAMILTON BAXTER PAMERICAN TELEPHONE & TELEGRAPH
1852045April 5, 1932Signaling arrangement for telephone linesEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1853117April 12, 1932Receiver for radio broadcast and wire distributing systemsLLOYD ESPENSCHIED ; FETTER CHARLES HAMERICAN TELEPHONE & TELEGRAPH
1853077April 12, 1932Timing circuit for telephone callsPETERSON GEORGE HAMERICAN TELEPHONE & TELEGRAPH
1853070April 12, 1932Equalization of power level in alpha signal transmitting systemDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
1854267April 19, 1932Tuning fork generatorMATTE ANDREW L.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1854255April 19, 1932Triple concentric conductor systemGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1854247April 19, 1932Multiplex phase discrimination transmission systemSMART BRAND ; PIERRE MERTZAMERICAN TELEPHONE & TELEGRAPH
1855321April 26, 1932Gas pressure alarm system for toll cablesSHACKLETON SAMUEL PAMERICAN TELEPHONE & TELEGRAPH
1855303April 26, 1932Multiple coaxial conductor systemMCCURDY RALPH GAMERICAN TELEPHONE & TELEGRAPH
1855288April 26, 1932Coaxial construction for power line carrier systemsGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1856224May 3, 1932Telegraph communication systemPERRY DONALD BAMERICAN TELEPHONE & TELEGRAPH
1856213May 3, 1932Radio receiving apparatusHAMILTON BAXTER P ; REA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1856204May 3, 1932Coaxial conductor systemAFFEL HERMAN A ; GREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1856202May 3, 1932Testing apparatusWILSON LEON TAMERICAN TELEPHONE & TELEGRAPH
1857259May 10, 1932Transmission systemREA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1857258May 10, 1932Transmission systemREA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1857238May 10, 1932Transmission systemCORY SAMUEL IAMERICAN TELEPHONE & TELEGRAPH
1858364May 17, 1932Multiple slide wire potentiometerKOENIG JR WALTERAMERICAN TELEPHONE & TELEGRAPH
1858350May 17, 1932Printing telegraph systemALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1858339May 17, 1932Piezo electric oscillatorOHL RUSSELL SAMERICAN TELEPHONE & TELEGRAPH
1858338May 17, 1932Means for compensating for nonlinear distortion in transmission circuitsHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1858307May 17, 1932Means for compensating for nonlinear distortion in transmission circuitsHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1860007May 24, 1932Telephone office alarm circuitBASCOM HENRY MAMERICAN TELEPHONE & TELEGRAPH
1859498May 24, 1932Vacuum tube control systemALLEN CARPEAMERICAN TELEPHONE & TELEGRAPH
1859404May 24, 1932Telephone exchange systemMCDAVITT MARCELLUS B.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1859390May 24, 1932Concentric conductor systemGREEN ESTILL I.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1859386May 24, 1932Telephone systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1859385May 24, 1932Telephone systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1860459May 31, 1932Signaling arrangement for two party telephone linesHOPPLE EDWARDS WILLIAMAMERICAN TELEPHONE & TELEGRAPH
1860458May 31, 1932Telephone signaling systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1860457May 31, 1932Signaling system for party telephone linesEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1860455May 31, 1932Lineman's test setEGINHARD DIETZEAMERICAN TELEPHONE & TELEGRAPH
1860446May 31, 1932Signaling systemBAILEY RAND S ; NEWBY NEAL D ; MOODY DWIGHT LAMERICAN TELEPHONE & TELEGRAPH
1862458June 7, 1932Measuring apparatusBARSTOW JOHN MAMERICAN TELEPHONE & TELEGRAPH
1861556June 7, 1932Cable reel trailerSMITH TEMPLE C ; LIVERMORE WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1861553June 7, 1932Alarm circuitSHANCK ROY BAMERICAN TELEPHONE & TELEGRAPH
1861550June 7, 1932Motor-generator regulator systemREA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1861549June 7, 1932Vehicle chockRATTA JAMES AAMERICAN TELEPHONE & TELEGRAPH
1861524June 7, 1932System for neutralizing crosstalk between signaling circuitsCOOLIDGE OLIVER HAMERICAN TELEPHONE & TELEGRAPH
1862608June 14, 1932Arrangement for producing modulated currentsSCHIMMING HAROLD HAMERICAN TELEPHONE & TELEGRAPH
1862598June 14, 1932Reeling deviceLIVERMORE WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1862595June 14, 1932Voltage regulatorHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1862591June 14, 1932Conduit threaderDONALD FISHERAMERICAN TELEPHONE & TELEGRAPH
1862587June 14, 1932Signaling arrangement for telephone systemsALMQUIST MILTON LAMERICAN TELEPHONE & TELEGRAPH
1863675June 21, 1932Means for reducing lightning interference in carrier telegraph circuitsTHORP VAUGHN PAMERICAN TELEPHONE & TELEGRAPH
1863674June 21, 1932Means for reducing lightning interference in carrier telegraph circuitsTHORP VAUGHN PAMERICAN TELEPHONE & TELEGRAPH
1863671June 21, 1932Cable-laying apparatusPITTS FREDERICK B ; GARLINGER MARSHALL T ; SMITH TEMPLE CAMERICAN TELEPHONE & TELEGRAPH
1863655June 21, 1932Means for reducing lightning interference in carrier telegraph systemsHAMILTON BAXTER PAMERICAN TELEPHONE & TELEGRAPH
1863651June 21, 1932Apparatus and method for remedying cross talkCHAPMAN ARTHUR GAMERICAN TELEPHONE & TELEGRAPH
1864676June 28, 1932Cable reel trailerSMITH TEMPLE C ; FREEMAN ALBERT E ; LIVERMORE WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1864670June 28, 1932Electrooptical systemREYNOLDS FREDERICK WAMERICAN TELEPHONE & TELEGRAPH
1864646June 28, 1932Telephone signaling arrangementEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1864645June 28, 1932Telephone signaling systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1865600July 5, 1932Multiswitch couplingWELCH PAUL VAMERICAN TELEPHONE & TELEGRAPH
1865593July 5, 1932Means for eliminating interference in grounded telegraph systemsSINGER FRED JAMERICAN TELEPHONE & TELEGRAPH
1865571July 5, 1932Means for eliminating interference in grounded telegraph systemsKLINE WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1866669July 12, 1932Impulse transmitterRHODES WILLIAM AAMERICAN TELEPHONE & TELEGRAPH
1866631July 12, 1932Magneto-optical deviceDORFF LOUIS A ; SANDALLS JR GEORGEAMERICAN TELEPHONE & TELEGRAPH
1866611July 12, 1932Concentric conducting systemAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1867663July 19, 1932Arrangement for producing modulated currentsGARBER LESLIE H ; HALL RALPH G ; CONOVER BLACKWOODAMERICAN TELEPHONE & TELEGRAPH
1867638July 19, 1932Telegraph printerALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1868585July 26, 1932Telephone systemPHELPS HENRY EAMERICAN TELEPHONE & TELEGRAPH
1868579July 26, 1932Broad-band audio-amplifierLANE ELMER ZAMERICAN TELEPHONE & TELEGRAPH
1868559July 26, 1932RelayBASCOM HENRY MAMERICAN TELEPHONE & TELEGRAPH
1869515August 2, 1932Measurement of attenuation and noiseSHANCK ROY BAMERICAN TELEPHONE & TELEGRAPH
1869459August 2, 1932Amplifying systemGORDON BOSTWICK LEEAMERICAN TELEPHONE & TELEGRAPH
1869458August 2, 1932Communication systemBICKELHAUPT CARROLL O ; PENUEL CECIL EAMERICAN TELEPHONE & TELEGRAPH
1870396August 9, 1932Telephone signaling systemABRAHAM LEONARD G ; STAPLES ELLIOT MAMERICAN TELEPHONE & TELEGRAPH
1870392August 9, 1932Telegraph printerWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1870352August 9, 1932Telegraph systemWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1871986August 16, 1932Method and means for reducing distortion of vacuum tube amplifiersHAMILTON HAROLD SAMERICAN TELEPHONE & TELEGRAPH
1871967August 16, 1932Electrical testing systemEDWARDS PAUL G ; HENNEBERGER THOMAS CAMERICAN TELEPHONE & TELEGRAPH
1871959August 16, 1932Transmission regulator systemCORDERMAN ROY CAMERICAN TELEPHONE & TELEGRAPH
1871944August 16, 1932Transmission measuring systemBEST FRED HAMERICAN TELEPHONE & TELEGRAPH
1871933August 16, 1932Telegraph printerWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1871923August 16, 1932Printing telegraph systemSINGER FRED J ; GARDNER LELAND AAMERICAN TELEPHONE & TELEGRAPH
1871916August 16, 1932Signal monitoring devicePIERCE RALPH EAMERICAN TELEPHONE & TELEGRAPH
1871906August 16, 1932Concentric shield for cablesNYQUIST HARRYAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1871904August 16, 1932Frequency converterNILES ELIOT W ; EDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1871886August 16, 1932Sound measuring systemINGLIS ALFRED H ; GOODALE JR WALTER D ; EGINHARD DIETZEAMERICAN TELEPHONE & TELEGRAPH
1875157August 30, 1932Compression and expansion of range of energy levelROBERTS LELAND CAMERICAN TELEPHONE & TELEGRAPH
1875156August 30, 1932Method and means for producing loss varying with energy levelROBERTS LELAND CAMERICAN TELEPHONE & TELEGRAPH
1874664August 30, 1932Multiplex telegraphyVERNAM GILBERT SAMERICAN TELEPHONE & TELEGRAPH
1874563August 30, 1932System for producing high voltage direct currentsMARTIN DE LOSS K.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1874543August 30, 1932Cable-carKENT ROBERT JAMERICAN TELEPHONE & TELEGRAPH
1874530August 30, 1932Transmission regulating systemHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1874472August 30, 1932Party telephone signaling arrangementEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1874466August 30, 1932Transmission regulating systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1877437September 13, 1932Start-stop telegraph systemWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1878724September 20, 1932Generating and modulating apparatusSTEVENS WALTER AAMERICAN TELEPHONE & TELEGRAPH
1878711September 20, 1932Electrooptical transmission systemREYNOLDS FREDERICK W.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1877872September 20, 1932Production of short electric wavesERICH HOLLMANN HANSAMERICAN TELEPHONE & TELEGRAPH
1879773September 27, 1932Electrical protective systemSWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
1879746September 27, 1932Submarine concentric conductor systemHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1879741September 27, 1932Telephone systemHAINES WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1880311October 4, 1932Printing telegraph systemBOOSE HARRY BAMERICAN TELEPHONE & TELEGRAPH
1880285October 4, 1932Wireless systemWILHELM SCHEPPMANNAMERICAN TELEPHONE & TELEGRAPH
1882150October 11, 1932Manhole guardKENT ROBERT JAMERICAN TELEPHONE & TELEGRAPH
1882125October 11, 1932Testing systemEDWARDS PAUL GAMERICAN TELEPHONE & TELEGRAPH
1881607October 11, 1932Printing telegraph systemHUNT ARTHUR E ; LANG WILMARTH YAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
1885826November 1, 1932System of photography employing frequency modulationHOLDEN WILLIAM H T ; BONELL RALPH KAMERICAN TELEPHONE & TELEGRAPH
1885798November 1, 1932Transmission regulationSMART BRANDAMERICAN TELEPHONE & TELEGRAPH
1885299November 1, 1932Monitoring systemSCHRAMM FRED WAMERICAN TELEPHONE & TELEGRAPH
1885214November 1, 1932Signaling systemALMQUIST MILTON L ; THOMPSON ALBERT CAMERICAN TELEPHONE & TELEGRAPH
1885195November 1, 1932Concentric conductor transmission systemGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1885168November 1, 1932Concentric conducting systemAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1887172November 8, 1932Combined earth boring machine and derrick apparatusCLIFFORD SMITH TEMPLE ; BEVERIDGE SPOWART JOHNAMERICAN TELEPHONE & TELEGRAPH
1886808November 8, 1932Bias control in telegraph communicationJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1887599November 15, 1932Constant current regulationHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1887576November 15, 1932Telephone pay station apparatusBOLLINGER HOWARD MAMERICAN TELEPHONE & TELEGRAPH
1888280November 22, 1932Reduction of interferenceMCCANN THOMAS AAMERICAN TELEPHONE & TELEGRAPH
1888266November 22, 1932Measurement of cross-talkJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1889083November 29, 1932Frequency stabilizing systemWINTRINGHAM WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1889053November 29, 1932Annunciator systemNELSON STANLEY FAMERICAN TELEPHONE & TELEGRAPH
1889824December 6, 1932Testing systemEDWARDS PAUL GAMERICAN TELEPHONE & TELEGRAPH
1889821December 6, 1932Prevention of overhearing in program circuitsCHAPMAN ARTHUR G ; MCCURDY RALPH GAMERICAN TELEPHONE & TELEGRAPH
1890561December 13, 1932Telephone circuitCASH CLAUDE CAMERICAN TELEPHONE & TELEGRAPH
1890543December 13, 1932Current-suppressorHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1891299December 20, 1932Radio telephone systemANDERSON CLIFFORD N ; TAYLOR EDMUND R ; WRIGHT SUMNER BAMERICAN TELEPHONE & TELEGRAPH
1891297December 20, 1932Variable gain circuit deviceWINTRINGHAM WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1893569January 10, 1933Reduction of interference in carrier systemsTHORP VAUGHN PAMERICAN TELEPHONE & TELEGRAPH
1893545January 10, 1933Alternating current amplifierGANNETT DANFORTH KAMERICAN TELEPHONE & TELEGRAPH
1894335January 17, 1933Phantom telephone circuitZINN MANVEL KAMERICAN TELEPHONE & TELEGRAPH
1894322January 17, 1933Means for eliminating distortion in repeatersHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1895058January 24, 1933Combined telegraphy and telephonyALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1895020January 24, 1933Telephone systemBASCOM HENRY MAMERICAN TELEPHONE & TELEGRAPH
1895542January 31, 1933Pilot channel indicating systemDEARDORFF RALPH WAMERICAN TELEPHONE & TELEGRAPH
1895531January 31, 1933Electrooptical systemWEAVER ALLANAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1896196February 7, 1933Telephone substation apparatusGREEN IRVING WAMERICAN TELEPHONE & TELEGRAPH
1896195February 7, 1933Electromagnetic signaling deviceGREEN IRVING W ; BISBEE FREDERICK CAMERICAN TELEPHONE & TELEGRAPH
1897533February 14, 1933Time control system for telephonesRICHEY CHARLES VAMERICAN TELEPHONE & TELEGRAPH
1897106February 14, 1933Telephone systemBASCOM HENRY MAMERICAN TELEPHONE & TELEGRAPH
1898921February 21, 1933Remote control systemWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1898133February 21, 1933Gauge for testing eccentricity of insulatorsLEIBE FRANK AAMERICAN TELEPHONE & TELEGRAPH
1898118February 21, 1933Signaling systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1900106March 7, 1933Bridging connection for program circuitsHAMILTON HAROLD S ; GEORGE CRISSONAMERICAN TELEPHONE & TELEGRAPH
1900045March 7, 1933Two-way negative resistance repeaterGEORGE CRISSONAMERICAN TELEPHONE & TELEGRAPH
1900992March 14, 1933Impulse transmission systemMCCANN THOMAS AAMERICAN TELEPHONE & TELEGRAPH
1900976March 14, 1933Concentric conductor systemALLEN CARPE ; LEIBE FRANK AAMERICAN TELEPHONE & TELEGRAPH
1902031March 21, 1933Filtering apparatusHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1902030March 21, 1933Gain control apparatusHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1902893March 28, 1933Signaling systemPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1902817March 28, 1933Communication with moving trainsAFFEL HERMAN A ; GREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1904567April 18, 1933Two-way telephone systemTAYLOR EDMUND RAMERICAN TELEPHONE & TELEGRAPH
1904494April 18, 1933Tuning fork generatorMATTE ANDREW L.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1904227April 18, 1933Gas pressure alarm system for cablesHENNEBERGER THOMAS CAMERICAN TELEPHONE & TELEGRAPH
1904226April 18, 1933Cable maintenance apparatusHENNEBERGER THOMAS CAMERICAN TELEPHONE & TELEGRAPH
1903999April 18, 1933Regulating systemHOLDEN WILLIAM H T ; JUTSON ROBERT PAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
1903888April 18, 1933Two-way telephone systemWRIGHT SUMNER B ; DOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
1903875April 18, 1933Transmission controlDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
1905359April 25, 1933Channel selectionAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1905353April 25, 1933Attenuation unitPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1906804May 2, 1933Polar duplex telegraph systemHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1906775May 2, 1933Voice operated gain adjusterSTAPLES ELLIOT MAMERICAN TELEPHONE & TELEGRAPH
1908351May 9, 1933Transmission measuring systemJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1908326May 9, 1933Selective signaling systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1909433May 16, 1933Voice operated control arrangement for radio telephone systemsTAYLOR EDMUND R ; WRIGHT SUMNER BAMERICAN TELEPHONE & TELEGRAPH
1909414May 16, 1933Tuning fork generatorMATTE ANDREW L.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1910471May 23, 1933Transmission lineLAIRD LOCKROW LAURICEAMERICAN TELEPHONE & TELEGRAPH
1910458May 23, 1933Printing telegraph arrangement for radio telephone systemsAUSTIN BAILEY ; JOSEPH HERMAN ; WINTRINGHAM WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1911481May 30, 1933Electrical protective systemSWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
1911480May 30, 1933Electrical protective systemSWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
1912510June 6, 1933Signaling system for party telephone linesBRADFORD RAYMOND CAMERICAN TELEPHONE & TELEGRAPH
1912508June 6, 1933Index holderANDREWS JOHN P ; POPPER JULIUS SAMERICAN TELEPHONE & TELEGRAPH
1913496June 13, 1933Automatic recordfr for transmission efficiencyMATTE ANDREW LAMERICAN TELEPHONE & TELEGRAPH
1913495June 13, 1933Multifrequency transmission measuring systemMATTE ANDREW LAMERICAN TELEPHONE & TELEGRAPH
1914414June 20, 1933System for measuring transmission at various frequenciesFAIRCHILD FRANK EAMERICAN TELEPHONE & TELEGRAPH
1914407June 20, 1933Signaling systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1915442June 27, 1933Cable conductor systemHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1915441June 27, 1933System for determining the gain of vacuum tubesHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1915440June 27, 1933Regenerative amplifierHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1915423June 27, 1933Cable benderKELLEMS EDGAR EAMERICAN TELEPHONE & TELEGRAPH
1915382June 27, 1933Radio telephone systemPRUDEN HAROLD M ; TAYLOR CHARLES CBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
1916316July 4, 1933Battery control circuitHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1916304July 4, 1933Testing systemEDWARDS PAUL GAMERICAN TELEPHONE & TELEGRAPH
1917960July 11, 1933Four wire circuitsLLOYD ESPENSCHIEDAMERICAN TELEPHONE & TELEGRAPH
1917453July 11, 1933System for producing high voltage direct currentsMARTIN DE LOSS K.AMERICAN TELEPHONE & TELEGRAPH COMPANY
1917418July 11, 1933Electric delay circuitsALMQUIST MILTON L ; THOMPSON ALBERT CAMERICAN TELEPHONE & TELEGRAPH
1918393July 18, 1933Amplifier of alternating currentsTOWNE HOLDEN WILLIAM HENRYAMERICAN TELEPHONE & TELEGRAPH
1918390July 18, 1933Transmission controlGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1919309July 25, 1933Apparatus and method for radio transmission and receptionSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1919300July 25, 1933MoldingEDWIN LEWISAMERICAN TELEPHONE & TELEGRAPH
1920454August 1, 1933Signal distortion indicating deviceALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1920453August 1, 1933Telegraphic intercommunicating systemWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1921187August 8, 1933Ultra-short-wave systemERICH HOLLMANN HANSAMERICAN TELEPHONE & TELEGRAPH
1921079August 8, 1933Telegraph systemHAMILTON BAXTER PAMERICAN TELEPHONE & TELEGRAPH
1921072August 8, 1933Telephone pay station apparatusHOPPLE EDWARDS WILLIAMAMERICAN TELEPHONE & TELEGRAPH
1921071August 8, 1933Telephone pay station apparatusHOPPLE EDWARDS WILLIAMAMERICAN TELEPHONE & TELEGRAPH
1921063August 8, 1933Treatment of echoes in transmission systemsAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1922139August 15, 1933Telegraph system for submarine cablesHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1922138August 15, 1933System for transposition of conductor sets in cablesHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1922116August 15, 1933Antenna arraySTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1922115August 15, 1933Antenna arraySTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1924628August 29, 1933Method of and apparatus for receiving high frequency oscillationsSMYTHE EDWIN HAMERICAN TELEPHONE & TELEGRAPH
1926181September 12, 1933Current generating deviceSCHRAMM FRED WAMERICAN TELEPHONE & TELEGRAPH
1926172September 12, 1933Printing telegraph exchange systemPERRY DONALD BAMERICAN TELEPHONE & TELEGRAPH
1926169September 12, 1933Phase and frequency controlHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1926144September 12, 1933Time controlled apparatusEDWARDS WHLIAM H ; GREEN IRVING WAMERICAN TELEPHONE & TELEGRAPH
1926143September 12, 1933Time controlled apparatusEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1927133September 19, 1933Transmission control in signaling systemsNEWBY NEAL D ; MOODY DWIGHT LAMERICAN TELEPHONE & TELEGRAPH
1927128September 19, 1933Gain control apparatusLINDSAY RUSSELL HAMERICAN TELEPHONE & TELEGRAPH
1927106September 19, 1933InsulatorWILSON LEON TAMERICAN TELEPHONE & TELEGRAPH
1927999September 26, 1933Volume control in telephone circuitsWRIGHT SUMNER B ; TAYLOR EDMUND RAMERICAN TELEPHONE & TELEGRAPH
1927989September 26, 1933System for replacement of alpha defective circuitHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1927978September 26, 1933Winch brakeFREEMAN ALBERT E ; SMITH TEMPLE CAMERICAN TELEPHONE & TELEGRAPH
1928735October 3, 1933Multiconductor system for signaling circuitsHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1928726October 3, 1933Wire arrangement in pole line systemsHUNTER RUSSELL NAMERICAN TELEPHONE & TELEGRAPH
1928720October 3, 1933Coupling arrangementEDWARDS PAUL GAMERICAN TELEPHONE & TELEGRAPH
1928610October 3, 1933High frequency signaling systemAFFEL HERMAN A.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1929580October 10, 1933Means for reenforcing cable sleevesGRAY JOSEPH HAMERICAN TELEPHONE & TELEGRAPH
1929574October 10, 1933Backboard mountingARMSTRONG FRANK CAMERICAN TELEPHONE & TELEGRAPH
1929570October 10, 1933Protective deviceTAYLOR EDMUND RAMERICAN TELEPHONE & TELEGRAPH
1929569October 10, 1933Sound amplifierSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1929568October 10, 1933ReelSPOWART JOHN BAMERICAN TELEPHONE & TELEGRAPH
1930631October 17, 1933Signaling systemTHOMPSON ALBERT CAMERICAN TELEPHONE & TELEGRAPH
1930627October 17, 1933Means for improving contact operationSHANCK ROY BAMERICAN TELEPHONE & TELEGRAPH
1930616October 17, 1933Signaling systemJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1930612October 17, 1933Telephone systemGETZ EMIL LAMERICAN TELEPHONE & TELEGRAPH
1930609October 17, 1933Signaling systemDAVIDSMEYER ORVILLE H ; AUGUSTINE VERNON MAMERICAN TELEPHONE & TELEGRAPH
1931867October 24, 1933Battery control systemHOLDEN WILLIAM H T ; JUTSON ROBERT P ; LAREW JOEL LAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
1931618October 24, 1933SwitchboardFOUSHEE NELSON STANLEYAMERICAN TELEPHONE & TELEGRAPH
1931604October 24, 1933Control apparatus for radioreceiversDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1931603October 24, 1933Telephone systemEDWARD DARROW WIRTAMERICAN TELEPHONE & TELEGRAPH
1931601October 24, 1933System of signaling circuits in alpha multiconductor cableCHAPMAN ARTHUR GAMERICAN TELEPHONE & TELEGRAPH
1931598October 24, 1933Pilot wire regulator systemABRAHAM LEONARD GAMERICAN TELEPHONE & TELEGRAPH
1932606October 31, 1933Gas filled discharge tube control systemSCHRAMM FRED WAMERICAN TELEPHONE & TELEGRAPH
1932602October 31, 1933Electric cable bondRATTA JAMES AAMERICAN TELEPHONE & TELEGRAPH
1932589October 31, 1933Frequency translating deviceTOWNE HOLDEN WILLIAM HENRYAMERICAN TELEPHONE & TELEGRAPH
1932588October 31, 1933Volume control systemHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1932568October 31, 1933Superimposed carrier telephone and carrier telegraph systemAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1934602November 7, 1933Selective antenna circuitGILMAN GEORGE WAMERICAN TELEPHONE & TELEGRAPH
1933795November 7, 1933Communication with moving vehiclesLLOYD ESPENSCHIED ; NEWTON MONKAMERICAN TELEPHONE & TELEGRAPH
1933680November 7, 1933Signaling systemOHL RUSSELL SAMERICAN TELEPHONE & TELEGRAPH
1933669November 7, 1933Selective antenna circuitsGILMAN GEORGE WAMERICAN TELEPHONE & TELEGRAPH
1933668November 7, 1933Arrangement for antenna transmission linesGILMAN GEORGE WAMERICAN TELEPHONE & TELEGRAPH
1933650November 7, 1933Signaling systemBASCOM HENRY MAMERICAN TELEPHONE & TELEGRAPH
1935594November 14, 1933Polyphase current generatorAFFEL HERMAN A.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1934897November 14, 1933Manifold typewriting machineWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1934879November 14, 1933Frequency measuring systemPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1934687November 14, 1933Telegraph systemGARDNER LELAND AAMERICAN TELEPHONE & TELEGRAPH
1934685November 14, 1933Multiplex signaling systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1934679November 14, 1933Coin controlled deviceBONORDEN ALLEN RAMERICAN TELEPHONE & TELEGRAPH
1936194November 21, 1933Gas pressure alarm contactorHENNEBERGER THOMAS C ; PIKE VERNON BAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
1935759November 21, 1933System for adjustment of transmission levelsABRAHAM LEONARD GAMERICAN TELEPHONE & TELEGRAPH
1935750November 21, 1933Telegraph systemSINGER FRED JAMERICAN TELEPHONE & TELEGRAPH
1935747November 21, 1933Soldering form for cablesRATTA JAMES AAMERICAN TELEPHONE & TELEGRAPH
1935744November 21, 1933Duplex radio systemTOWNE HOLDEN WILLIAM HENRYAMERICAN TELEPHONE AND TELCGRA
1935737November 21, 1933Instruction card holderRUDOLPH CHRIST HENRYAMERICAN TELEPHONE & TELEGRAPH
1936713November 28, 1933Winch clutch and brakeFREEMAN ALBERT E ; LIVERMORE WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1936706November 28, 1933Directionally selective sound receiverAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1936704November 28, 1933Mounting for books and the likeHERMAN ZIESCHANG GUSTAVAMERICAN TELEPHONE & TELEGRAPH
1937652December 5, 1933Coaxial conductor systemGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1937641December 5, 1933Multiway connection for signaling circuitsGEORGE CRISSONAMERICAN TELEPHONE & TELEGRAPH
1937640December 5, 1933Means for preventing bias in telegraph systemsCLARKE JOHN LAMERICAN TELEPHONE & TELEGRAPH
1939613December 12, 1933Printing telegraph systemWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1938742December 12, 1933Gas-filled discharge tubeSIDNEY DEMAREST CHARLESAMERICAN TELEPHONE & TELEGRAPH
1938741December 12, 1933Gas-filled discharge tubeSIDNEY DEMAREST CHARLESAMERICAN TELEPHONE & TELEGRAPH
1938732December 12, 1933System for improving the shielding effect of ground wires and shield wiresFRIDSTEIN VAAGE EMILAMERICAN TELEPHONE & TELEGRAPH
1940370December 19, 1933Telegraph systemREA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1940181December 19, 1933Vacuum tube circuitsNYQUIST HARRYAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1939796December 19, 1933Duct rodding apparatusSPOWART JOHN BAMERICAN TELEPHONE & TELEGRAPH
1940780December 26, 1933Insulator for coaxial conductorsWILSON LEON TAMERICAN TELEPHONE & TELEGRAPH
1940769December 26, 1933Coupling devicePOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1940764December 26, 1933Time senderMCCANN THOMAS AAMERICAN TELEPHONE & TELEGRAPH
1941636January 2, 1934RadioantennaSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1941627January 2, 1934Remote control systemSCHRAMM FRED WAMERICAN TELEPHONE & TELEGRAPH
1943104January 9, 1934Transmission control in signaling systemsBJORNSON BJORN G ; DOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
1942811January 9, 1934Single stroke gongGREEN IRVING WAMERICAN TELEPHONE & TELEGRAPH
1942547January 9, 1934BinderGORDON WALTER A ; O'NEIL DANIEL JAMERICAN TELEPHONE & TELEGRAPH
1943478January 16, 1934Transmission level control in telegraph signaling systemsJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
1943475January 16, 1934System for selective calling of telegraph stationsGURLEY ROGER KAMERICAN TELEPHONE & TELEGRAPH
1944308January 23, 1934Transmission systemTURNER HOWARD CAMERICAN TELEPHONE & TELEGRAPH
1944297January 23, 1934Distortion correcting for transmission linesHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1944269January 23, 1934Telephone systemRAYNSFORD ARTHUR ; HAINES WILLIAM T.BEIL TELEPHONE LABORATORIES, INCORPORATED
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1944991January 30, 1934Two-way telegraph systemMCCANN THOMAS AAMERICAN TELEPHONE & TELEGRAPH
1944961January 30, 1934Telephone systemBAILEY RAND SAMERICAN TELEPHONE & TELEGRAPH
1945639February 6, 1934Discharge tubeTOWNE HOLDEN WILLIAM HENRYAMERICAN TELEPHONE & TELEGRAPH
1946615February 13, 1934Signaling systemSIDNEY DEMAREST CHARLESAMERICAN TELEPHONE & TELEGRAPH
1946607February 13, 1934Amplifier controlAFFEL HERMAN A ; GREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
1947621February 20, 1934Reverberation circuitSCHREIBER ERNST HAMERICAN TELEPHONE & TELEGRAPH
1947588February 20, 1934Fuse and mounting thereforGLEZEN LEE L ; SHACKLETON SAMUEL PAMERICAN TELEPHONE & TELEGRAPH
1948675February 27, 1934Artificial line and attenuator of constant resistanceRHODES HAROLD AAMERICAN TELEPHONE & TELEGRAPH
1948671February 27, 1934Radiotransmission without distortionKIMBALL POTTER RALPHAMERICAN TELEPHONE & TELEGRAPH
1949584March 6, 1934Means for controlling telegraph biasSHANCK ROY BAMERICAN TELEPHONE & TELEGRAPH
1949570March 6, 1934Power distributing systemHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
1950552March 13, 1934Relay coverHANSEN ARNOLD AAMERICAN TELEPHONE & TELEGRAPH
1950541March 13, 1934Carrier frequency receiving circuitsALLEN CARPEAMERICAN TELEPHONE & TELEGRAPH
1951482March 20, 1934Alternating current power reserve systemHOLDEN WILLIAM HENRY TOWNEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1951465March 20, 1934Echo suppressorWRIGHT SUMNER B ; DOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
1952524March 27, 1934Transmission regulator circuitsAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1952280March 27, 1934Call recording systemPARKER RALZEMOND D ; SWEZEY BURDETTE SAMERICAN TELEPHONE & TELEGRAPH
1953157April 3, 1934Acoustic decremeterEGINHARD DIETZE ; GOODALE JR WALTER DAMERICAN TELEPHONE & TELEGRAPH
1953152April 3, 1934Signal transmitting systemCLARK ALVA BAMERICAN TELEPHONE & TELEGRAPH
1954067April 10, 1934Pad holderRICHARD CARLSON HERBERT NELSAMERICAN TELEPHONE & TELEGRAPH
1954025April 10, 1934Electrooptical systemREYNOLDS FREDERICK WAMERICAN TELEPHONE & TELEGRAPH
1954932April 17, 1934Telephone and direct conversation circuitsHARRIS WALTER LAMERICAN TELEPHONE & TELEGRAPH
1954898April 17, 1934Radio receiving systemSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
1955875April 24, 1934Signaling systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1955874April 24, 1934Means for controlling gas filled discharge tubesDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1956704May 1, 1934Regenerative signal repeaterALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1956670May 1, 1934Selective signaling systemSIDNEY DEMAREST CHARLESAMERICAN TELEPHONE & TELEGRAPH
1957586May 8, 1934LockLOUIS GUTMANAMERICAN TELEPHONE & TELEGRAPH
1957571May 8, 1934Echo suppressorWRIGHT SUMNER B ; ABRAHAM LEONARD GAMERICAN TELEPHONE & TELEGRAPH
1958930May 15, 1934Automatic switching telegraph private branch exchange systemSINGER FRED JAMERICAN TELEPHONE & TELEGRAPH
1958523May 15, 1934Bias control in telegraph communicationTREAT REA WILTONAMERICAN TELEPHONE & TELEGRAPH
1958510May 15, 1934Monitoring circuitCOWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
1959494May 22, 1934System for voltage transformation of currents of wide frequency rangeHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1959459May 22, 1934Frequency changing systemCOWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
1960360May 29, 1934Printing telegraph systemFISK WATSON EDWARDAMERICAN TELEPHONE & TELEGRAPH
1960350May 29, 1934Automatic balancing arrangementPAUL SHACKLOTON SAMUEL ; GRIFFITH EDWARDS PAULAMERICAN TELEPHONE & TELEGRAPH
1961407June 5, 1934Printing telegraph systemVERNAM GILBERT S ; LOCKE GEORGE AAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
1961279June 5, 1934Echo suppressorGEORGE CRISSONAMERICAN TELEPHONE & TELEGRAPH
1961274June 5, 1934Echo suppressorABRAHAM LEONARD GAMERICAN TELEPHONE & TELEGRAPH
1962196June 12, 1934High frequency oscillatorERICH HOLLMANN HANSAMERICAN TELEPHONE & TELEGRAPH
1962195June 12, 1934Method and apparatus for the generation of electric oscillationsERICH HOLLMANN HANSAMERICAN TELEPHONE & TELEGRAPH
1963223June 19, 1934Radio volume compression systemRALPH BOWNAMERICAN TELEPHONE & TELEGRAPH
1963198June 19, 1934Transmission regulator circuitsGANNETT DANFORTH KAMERICAN TELEPHONE & TELEGRAPH
1964141June 26, 1934Impedance measuring circuitsRHODES HAROLD A ; COWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
1964110June 26, 1934Control systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1964849July 3, 1934Wire supportGORDON GEORGE B ; DAHL HAROLD A CAMERICAN TELEPHONE & TELEGRAPH
1964845July 3, 1934VentilatorDIETZE EGINHARD ; JR. WALTER DEMING GOODALE,AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1965711July 10, 1934Signaling systemRADCLIFF JOHN PAMERICAN TELEPHONE & TELEGRAPH
1965689July 10, 1934Adjustable aerial platformBENNING COWAN HENRY ; CODY ZERMAN WILLIAMAMERICAN TELEPHONE & TELEGRAPH
1966569July 17, 1934Portable lampFRANCIS VOORHEES STEPHENAMERICAN TELEPHONE & TELEGRAPH
1966561July 17, 1934TentRATTA JR JAMES ALBERTAMERICAN TELEPHONE & TELEGRAPH
1967376July 24, 1934Adjustable aerial platformSMITH TEMPLE C ; FREEMAN ALBERT E ; LIVERMORE WILLIAM TAMERICAN TELEPHONE & TELEGRAPH
1967368July 24, 1934Regenerative repeaterREEVE ELMER WAMERICAN TELEPHONE & TELEGRAPH
1968169July 31, 1934Means for producing a phase modulated wavePOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1968164July 31, 1934System for measuring transmission losses at various frequenciesHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1970938August 21, 1934Telegraph exchange systemKINKEAD FULLERTON S ; KNANDEL GEORGE JBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
1973595September 11, 1934Two-way telephone systemWRIGHT SUMNER B ; TAYLOR EDMUND RAMERICAN TELEPHONE & TELEGRAPH
1973589September 11, 1934Typewriting machineWATSON EDWARD FAMERICAN TELEPHONE & TELEGRAPH
1973027September 11, 1934Transmission systemCHANCE TAYLOR CHARLESAMERICAN TELEPHONE & TELEGRAPH
1972985September 11, 1934Electric switching deviceGARDNER LELAND AAMERICAN TELEPHONE & TELEGRAPH
1975207October 2, 1934Telephone systemGETZ EMIL L ; PENTLAND ROBERT L ; DORFF LOUIS AAMERICAN TELEPHONE & TELEGRAPH
1975203October 2, 1934Printing telegraph systemFAY FRANK H ; BACON WALTER MAMERICAN TELEPHONE & TELEGRAPH
1976660October 9, 1934Code calling systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
1977256October 16, 1934Resetting circuits for gas filled tubesKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
1977255October 16, 1934Parallel operated gas filled tubeSWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
1977254October 16, 1934Glow discharge tube circuitSWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
1978021October 23, 1934Ultrashort wave systemERICH HOLLMANN HANSAMERICAN TELEPHONE & TELEGRAPH
1977776October 23, 1934Telegraph alarm circuitsREA WILTON TAMERICAN TELEPHONE & TELEGRAPH
1977751October 23, 1934Wave transmission networkJULIUS ZOBEL OTTOAMERICAN TELEPHONE & TELEGRAPH
1979414November 6, 1934Differential mechanismCLIFFORD SMITH TEMPLEAMERICAN TELEPHONE & TELEGRAPH
1979402November 6, 1934Concentric shield for cablesHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
1980305November 13, 1934Telegraph switching systemALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
1980292November 13, 1934Method and apparatus for producing musical soundsPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
1981114November 20, 1934Privacy systemDOREN MITCHELL ; WRIGHT SUMNER BAMERICAN TELEPHONE & TELEGRAPH
1981113November 20, 1934Privacy systemDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
1982022November 27, 1934Telegraph systemREEVE ELMER WAMERICAN TELEPHONE & TELEGRAPH
1981999November 27, 1934Optical telephone systemFRENCH NORMAN RAMERICAN TELEPHONE & TELEGRAPH
1982766December 4, 1934Electrical measuring deviceHOFER SCHREIBER ERNSTAMERICAN TELEPHONE & TELEGRAPH
1982735December 4, 1934Telephone coin systemJENNINGS HEITSMITH WILLIAMAMERICAN TELEPHONE & TELEGRAPH
1983637December 11, 1934Remote control systemPERRY DONALD BAMERICAN TELEPHONE & TELEGRAPH
1983586December 11, 1934Paper feed mechanismWATSON EDWARD F ; MCCANN THOMAS AAMERICAN TELEPHONE & TELEGRAPH
1984460December 18, 1934Coin chuteARTHUR CARSONAMERICAN TELEPHONE & TELEGRAPH
1984451December 18, 1934Short wave radio signalingAUSTIN BAILEYAMERICAN TELEPHONE & TELEGRAPH
1985353December 25, 1934Reduction of disturbing voltages in electric circuitsANSON RHODES HAROLDAMERICAN TELEPHONE & TELEGRAPH
1985348December 25, 1934Method of locating cable sheath defectsHENNEBERGER THOMAS CAMERICAN TELEPHONE & TELEGRAPH
1986921January 8, 1935Selective signaling systemDEMAREST CHARLES S.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1992283February 26, 1935Transmitting wave antenna systemBAILEY AUSTIN ; HARPER AUGUSTUS E. ; WILLIS FRENCH H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1992282February 26, 1935Radio receiving antennaBAILEY AUSTIN ; WINTRINGHAM WILLIAM T.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1994626March 19, 1935Speed regulating deviceTOWNSEND GEORGE FAMERICAN TELEPHONE & TELEGRAPH
1996186April 2, 1935Transmission line conductorAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
1997705April 16, 1935Calling arrangement for radiotelephone circuitsTAYLOR EDMUND R. ; TAYLOR CHARLES C.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2001037May 14, 1935Voltage compensation in signaling circuitsTREAT REA WILTON ; CLINTON HENNEBERGER THOMASAMERICAN TELEPHONE & TELEGRAPH
2004244June 11, 1935Selective signaling systemHOLDEN WILLIAM HENRY TOWNEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2006433July 2, 1935Coin collecting apparatusBIERSTEDT GUSTAV C ; MILLS PERCY EAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
2007416July 9, 1935Volume control circuitANDREW AFFEL HERMANAMERICAN TELEPHONE & TELEGRAPH
2008061July 16, 1935Apparatus and method for remedying crosstalkCOOLIDGE OLIVER H ; ALEXANDER WEAVER MYRONAMERICAN TELEPHONE & TELEGRAPH
2014179September 10, 1935Electrical discharge registering systemHONAMAN RICHARD KAMERICAN TELEPHONE & TELEGRAPH
2014104September 10, 1935Sheet form holderDENCKLAU KARL RAMERICAN TELEPHONE & TELEGRAPH
2014506September 17, 1935Coin collection apparatusJOHN PATCHE CLINTONAMERICAN TELEPHONE & TELEGRAPH
2014505September 17, 1935Coin chuteJOHN PATCHE CLINTONAMERICAN TELEPHONE & TELEGRAPH
2015323September 24, 1935Printing telegraph systemJOHN SINGER FRED ; STEVENS SWEZEY BURDETTEAMERICAN TELEPHONE & TELEGRAPH
2015155September 24, 1935Telegraph systemREA WILTON TAMERICAN TELEPHONE & TELEGRAPH
2015795October 1, 1935Mounting for telephone coin collectorsMORRILL GREENE ; JOSEPH HALLIGAN BURDETTE ; WAGNER JR RICHARDAMERICAN TELEPHONE & TELEGRAPH
2015779October 1, 1935Transmission measuring systemHELLER BEST FREDAMERICAN TELEPHONE & TELEGRAPH
2016452October 8, 1935Carrier current channel separation systemHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
2016427October 8, 1935Volume range controlGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2017180October 15, 1935Communication amplifier with feed-backCOWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
2017175October 15, 1935Measurement of return lossGLADSTONE ABRAHAM LEONARD ; DOREN MITCHELL ; SHAW HAWKINS RUSSELLAMERICAN TELEPHONE & TELEGRAPH
2018140October 22, 1935Band pass networkLOW HERBERT WAMERICAN TELEPHONE & TELEGRAPH
2017977October 22, 1935Automatic bias eliminatorHENRY LADNERAMERICAN TELEPHONE & TELEGRAPH
2017923October 22, 1935Gain control apparatusSHACKLETON SAMUEL PAMERICAN TELEPHONE & TELEGRAPH
2018859October 29, 1935Unattended repeater systemAUGUSTUS LEIBE FRANKAMERICAN TELEPHONE & TELEGRAPH
2018851October 29, 1935Unattended repeater systemIBBOTSON GREEN ESTILL ; AUGUSTUS LEIBE FRANKAMERICAN TELEPHONE & TELEGRAPH
2018850October 29, 1935Unattended repeater systemIBBOTSON GREEN ESTILL ; AUGUSTUS LEIBE FRANKAMERICAN TELEPHONE & TELEGRAPH
2019577November 5, 1935System of variable amplificationDOREN MITCHELL ; LIONEL SCHOTTAMERICAN TELEPHONE & TELEGRAPH
2019561November 5, 1935Telephone systemEDWARD DARROW WIRT ; HARRY PETERSON GEORGEAMERICAN TELEPHONE & TELEGRAPH
2020487November 12, 1935Electrical signalingWADSWORTH PAUL W ; TAYLOR CHARLES CBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
2020409November 12, 1935Band separation systemGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2020308November 12, 1935Ocean cable systemKING GANNETT DANFORTHAMERICAN TELEPHONE & TELEGRAPH
2021270November 19, 1935Electrical protective systemSWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
2021269November 19, 1935Electrical protective systemKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2021268November 19, 1935Electrical protective systemKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2022248November 26, 1935Television equipmentLOFGREN BENJAMIN FAMERICAN TELEPHONE & TELEGRAPH
2021984November 26, 1935Coin collectorHENRY CHASE LELANDAMERICAN TELEPHONE & TELEGRAPH
2021978November 26, 1935Testing systemLEROY ALMQUIST MILTON ; GRIFFITH EDWARDS PAUL ; EDWARD CLUTTS CHARLESAMERICAN TELEPHONE & TELEGRAPH
2022790December 3, 1935Frequency indicating systemWERNER STURDY WILLIAMAMERICAN TELEPHONE & TELEGRAPH
2022758December 3, 1935Ground detecting arrangementCORDERMAN ROY CAMERICAN TELEPHONE & TELEGRAPH
2023556December 10, 1935Frequency selective communication systemSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
2023504December 10, 1935Radio receiving apparatusBAILEY RAND SAMERICAN TELEPHONE & TELEGRAPH
2024280December 17, 1935Means to reduce the effect of interfering currents on telephone circuitsHOPPLE EDWARDS WILLIAM ; EGINHARD DIETZEAMERICAN TELEPHONE & TELEGRAPH
2024275December 17, 1935Potentiometer deviceHAROLD CLARK JEANAMERICAN TELEPHONE & TELEGRAPH
2025158December 24, 1935Modulating systemAUGUSTUS COWAN FRANKAMERICAN TELEPHONE & TELEGRAPH
2025145December 24, 1935Transmission systemBASCOM HENRY M ; FRIEND OTTO A ; MCDAVITT MARCELLUS BAMERICAN TELEPHONE & TELEGRAPH
2025925December 31, 1935Telephone systemWINSOR JR PAULAMERICAN TELEPHONE & TELEGRAPH
2025912December 31, 1935Signaling system employing glow dischargesKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2025880December 31, 1935Telephone systemBALLI MCDAVITT MARCELLUSAMERICAN TELEPHONE & TELEGRAPH
2026712January 7, 1936Composite oscillator for electromagnetic wavesSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
2026696January 7, 1936Signaling systemDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
2027465January 14, 1936Telephone systemBRAZELTON ROY MAMERICAN TELEPHONE & TELEGRAPH
2027463January 14, 1936Telephone systemMELVIN BASCOM HENRY ; ALBERT FRIEND OTTOAMERICAN TELEPHONE & TELEGRAPH
2028525January 21, 1936LockSCHMIDT FREDERIC EAMERICAN TELEPHONE & TELEGRAPH
2028495January 21, 1936LockRAYMOND BREEN JOHN ; STRAUSBACH ARLINGTON SAMERICAN TELEPHONE & TELEGRAPH
2028289January 21, 1936Time announcement systemLEWIS BENJAMIN FAMERICAN TELEPHONE & TELEGRAPH
2028278January 21, 1936Vacuum tube testing systemKING GANNETT DANFORTH ; JACKSON HEIGHTS ; LEWIS BENJAMIN FAMERICAN TELEPHONE & TELEGRAPH
2028835January 28, 1936Start-stop telegraph repeaterJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
2028818January 28, 1936Printing telegraph systemJACOB ANSPACH RUSSELL ; WEBSTER HARRISON JACKSONAMERICAN TELEPHONE & TELEGRAPH
2029421February 4, 1936Concentric conductor transmission systemGREEN ESTILL I ; LEIBE FRANK AAMERICAN TELEPHONE & TELEGRAPH
2029420February 4, 1936Concentric conductor transmission systemGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2030181February 11, 1936Directional radio signalingKIMBALL POTTER RALPHAMERICAN TELEPHONE & TELEGRAPH
2030178February 11, 1936Electrical circuit arrangementPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
2030987February 18, 1936Oscillation control deviceALFRED HERCKMANSAMERICAN TELEPHONE & TELEGRAPH
2030971February 18, 1936Operator's telephone circuitEGINHARD DIETZEAMERICAN TELEPHONE & TELEGRAPH
2030961February 18, 1936Operator's telephone circuitCARTER HERMAN TAMERICAN TELEPHONE & TELEGRAPH
2031728February 25, 1936Electrooptical systemHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
2031696February 25, 1936Switching arrangement for four-wire circuitsLLOYD ESPENSCHIED ; NEWTON MONKAMERICAN TELEPHONE & TELEGRAPH
2031692February 25, 1936Telephone systemARTHUR CARSONAMERICAN TELEPHONE & TELEGRAPH
2032514March 3, 1936Gas-filled tube and circuit thereforKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2032513March 3, 1936Electrical protective systemKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2032512March 3, 1936Electrical protective systemSWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
2032360March 3, 1936Power line carrier systemGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2033265March 10, 1936Annunciator systemALBERT TRADUPAMERICAN TELEPHONE & TELEGRAPH
2033242March 10, 1936Mechanical repeater circuitsHUBBARD FRANCIS AAMERICAN TELEPHONE & TELEGRAPH
2033237March 10, 1936Frequency control systemGANNETT DANFORTH KAMERICAN TELEPHONE & TELEGRAPH
2034047March 17, 1936Coaxial circuit with stranded inner conductorLEIBE FRANK A ; ROGERS THEODORE CAMERICAN TELEPHONE & TELEGRAPH
2034036March 17, 1936Circuits with hexagonal shieldsGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2034035March 17, 1936Circuits with double circular shieldsGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2034034March 17, 1936Circuits with noncircular shieldsGREEN ESTILL I ; LEIBE FRANK AAMERICAN TELEPHONE & TELEGRAPH
2034033March 17, 1936Shielded stranded pairGREEN ESTILL I ; CURTIS HAROLD EAMERICAN TELEPHONE & TELEGRAPH
2034032March 17, 1936Shielded pair of wiresGREEN ESTILL I ; CURTIS HAROLD E ; MEAD SALLIE PAMERICAN TELEPHONE & TELEGRAPH
2034026March 17, 1936Circuits with circular shieldsCURTIS HAROLD E ; MEAD SALLIE PAMERICAN TELEPHONE & TELEGRAPH
2034826March 24, 1936Modulator for alternating currentsHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
2034825March 24, 1936Metering assemblyNEWELL NORMAN AAMERICAN TELEPHONE & TELEGRAPH
2034806March 24, 1936Telegraph testing systemSIDNEY HUDSONAMERICAN TELEPHONE & TELEGRAPH
2034791March 24, 1936Statistical tabulating and printing telegraph systemAUSTIN BAILEY ; MEARNS THOMSON HOWARDAMERICAN TELEPHONE & TELEGRAPH
2035577March 31, 1936Printing telegraph exchange systemVERNAM GILBERT SAMERICAN TELEPHONE & TELEGRAPH
2035559March 31, 1936Coin chuteMOORE MAHANY AUGUSTUSAMERICAN TELEPHONE & TELEGRAPH
2035545March 31, 1936Coaxial conductor transmission systemGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2035537March 31, 1936Truck platform ladderBENNING COWAN HENRY ; CODY ZERMAN WILLIAMAMERICAN TELEPHONE & TELEGRAPH
2035536March 31, 1936Interconnection of transmission linesCOWAN FRANK A ; GOETZ GASTON JAMERICAN TELEPHONE & TELEGRAPH
2036383April 7, 1936Frequency control distributionANDREW AFFEL HERMANAMERICAN TELEPHONE & TELEGRAPH
2036381April 7, 1936Impedance equalizing systemKEEPORT ZINN MANVELAMERICAN TELEPHONE & TELEGRAPH
2036332April 7, 1936Signal distortion indicatorJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
2036316April 7, 1936Telephone systemMELVIN BASCOM HENRYAMERICAN TELEPHONE & TELEGRAPH
2037154April 14, 1936Radio receiving systemSTONE STONE JOHNAMERICAN TELEPHONE & TELEGRAPH
2037150April 14, 1936Error indicator for open-wire circuitsROBERTS LELAND CAMERICAN TELEPHONE & TELEGRAPH
2037107April 14, 1936Transmission gain controlGLADSTONE ABRAHAM LEONARDAMERICAN TELEPHONE & TELEGRAPH
2037106April 14, 1936Telephone systemHERRICK ABBOTT HENRY ; DOW NEWBY NEALAMERICAN TELEPHONE & TELEGRAPH
2037865April 21, 1936Diversity reception systemPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
2037859April 21, 1936Protective system for cable circuitsKARL HONAMAN RICHARD ; INSKIP LEONARD S ; KASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2037847April 21, 1936Synchronizing systemRALPH BOWNAMERICAN TELEPHONE & TELEGRAPH
2037846April 21, 1936Reduction of disturbing voltages in electric circuitsAIKENS ANDREW JAMERICAN TELEPHONE & TELEGRAPH
2038683April 28, 1936Pulsating direct current generatorSCHRAMM FRED WAMERICAN TELEPHONE & TELEGRAPH
2038649April 28, 1936Selective signaling systemSIDNEY DEMAREST CHARLESAMERICAN TELEPHONE & TELEGRAPH
2038647April 28, 1936Signaling systemPETER CLAUSEN HENRYAMERICAN TELEPHONE & TELEGRAPH
2039449May 5, 1936Gas-filled discharge tube systemRADCLIFF JOHN P ; GRIFFITH EDWARDS PAULAMERICAN TELEPHONE & TELEGRAPH
2039413May 5, 1936Telephone lineOLIVER HENDERSONAMERICAN TELEPHONE & TELEGRAPH
2039405May 5, 1936Remote metering systemGREEN ESTILL I ; TIDD WARREN HAMERICAN TELEPHONE & TELEGRAPH
2039404May 5, 1936Remote metering systemGREEN ESTILL I ; TIDD WARREN HAMERICAN TELEPHONE & TELEGRAPH
2040471May 12, 1936Selective signaling systemBURROWS COXHEAD HARRYAMERICAN TELEPHONE & TELEGRAPH
2040462May 12, 1936Selective signaling systemRALPH BOWNAMERICAN TELEPHONE & TELEGRAPH
2040219May 12, 1936Electrical protective systemKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2041101May 19, 1936Telephone transmission circuitBISBEE WRIGHT SUMNER ; DOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
2041008May 19, 1936Voltage measuring systemMATTE ANDREW LAMERICAN TELEPHONE & TELEGRAPH
2040970May 19, 1936Telephone transmission circuitGLADSTONE ABRAHAM LEONARD ; DOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
2041964May 26, 1936Telephone systemSANDALLS JR GEORGEAMERICAN TELEPHONE & TELEGRAPH
2041951May 26, 1936Modulating systemJOZEF PLEBANSKIAMERICAN TELEPHONE & TELEGRAPH
2041933May 26, 1936Telephone systemHARTWELL INGLIS ALFREDAMERICAN TELEPHONE & TELEGRAPH
2043417June 9, 1936Signaling systemDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
2043403June 9, 1936Telephone transmission circuitsBISBEE WRIGHT SUMNER ; GLADSTONE ABRAHAM LEONARDAMERICAN TELEPHONE & TELEGRAPH
2043399June 9, 1936Electrical protective systemKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2044527June 16, 1936Cutting toolWALTER GREEN IRVINGAMERICAN TELEPHONE & TELEGRAPH
2044512June 16, 1936Electrical protective systemKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2044424June 16, 1936Insulation testing systemEDWARDS PAUL G ; CLUTTS CHARLES EAMERICAN TELEPHONE & TELEGRAPH
2045071June 23, 1936Altimeter for aircraftLLOYD ESPENSCHIEDAMERICAN TELEPHONE & TELEGRAPH
2045735June 30, 1936Radio receiving circuitsCHANCE TAYLOR CHARLESAMERICAN TELEPHONE & TELEGRAPH
2045720June 30, 1936Telephone transmission circuitHARRY NYQUIST ; BISBEE WRIGHT SUMNER ; GLADSTONE ABRAHAM LEONARDAMERICAN TELEPHONE & TELEGRAPH
2046438July 7, 1936Motor generator regulator systemMATTE ANDREW LAMERICAN TELEPHONE & TELEGRAPH
2046437July 7, 1936Facsimile telegraph systemFISK WATSON EDWARDAMERICAN TELEPHONE & TELEGRAPH
2046436July 7, 1936Ground impedance measurementGEORGE WASCHECKAMERICAN TELEPHONE & TELEGRAPH
2047817July 14, 1936Picture transmitting systemAUSTIN BAILEYAMERICAN TELEPHONE & TELEGRAPH
2047427July 14, 1936Pressure contactorHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
2047312July 14, 1936Signaling systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
2047304July 14, 1936Signaling systemALMQUIST MILTON LAMERICAN TELEPHONE & TELEGRAPH
2048091July 21, 1936Power line carrier systemAFFEL HERMAN A ; GREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2048080July 21, 1936Signaling with high frequency wavesKIMBALL POTTER RALPHAMERICAN TELEPHONE & TELEGRAPH
2048052July 21, 1936Meter for recording elapsed timeCHARLES BARNES HOWARDAMERICAN TELEPHONE & TELEGRAPH
2048828July 28, 1936Radio and wire broadcasting systemTIDD WARREN HAMERICAN TELEPHONE & TELEGRAPH
2048810July 28, 1936Telephone coin collectorJOHN PATCHE CLINTONAMERICAN TELEPHONE & TELEGRAPH
2050265August 11, 1936Iterative telegraph systemRAIPH BOWNAMERICAN TELEPHONE & TELEGRAPH
2051529August 18, 1936High frequency signaling systemHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
2054008September 8, 1936Electrical protective systemKASSON SWART LELAND ; DRENNER TEBO JULIANAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
2053988September 8, 1936Electrical protective systemPOLK FERRIS LIVINGSTON ; UPPER MONTCLAIR ; KARL HONAMAN RICHARD ; INSKIP LEONARD SAMERICAN TELEPHONE & TELEGRAPH
2053982September 8, 1936WhistleWEISS GARLAND FAMERICAN TELEPHONE & TELEGRAPH
2053605September 8, 1936Selective signaling systemHOPPLE EDWARDS WILLIAM ; WILLIAM HALLIGAN CLAIRAMERICAN TELEPHONE & TELEGRAPH
2054718September 15, 1936Continuously loaded conductorKEEPORT ZINN MANVELAMERICAN TELEPHONE & TELEGRAPH
2054910September 22, 1936Telephone systemFOUSHEE NELSON STANLEY ; FOSTER SHIPLEY FRANKAMERICAN TELEPHONE & TELEGRAPH
2054906September 22, 1936Transmission control in signaling systemsLEWIS BENJAMIN FAMERICAN TELEPHONE & TELEGRAPH
2054901September 22, 1936Communication systemGOETZ GASTON JAMERICAN TELEPHONE & TELEGRAPH
2054816September 22, 1936Electronic oscillatorERICH HOLLMANN HANSAMERICAN TELEPHONE & TELEGRAPH
2055593September 29, 1936Electron discharge deviceREYNOLDS FREDERICK W.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2055575September 29, 1936Telegraph repeater circuitsJOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
2055567September 29, 1936Teletypewriter systemFISK WATSON EDWARDAMERICAN TELEPHONE & TELEGRAPH
2056347October 6, 1936Signaling systemSIDNEY DEMAREST CHARLES ; RADCLIFF JOHN PAMERICAN TELEPHONE & TELEGRAPH
2056346October 6, 1936Signaling systemDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
2058170October 20, 1936Marginal control of gas-filled tubesMOREHOUSE LYMAN F ; SHACKLETON SAMUEL PAMERICAN TELEPHONE & TELEGRAPH
2060585November 10, 1936Telephone signal circuitMILLER CHARLES GIDEONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2060545November 10, 1936Stock quotation systemABBOTT HENRY HERRICKAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2060042November 10, 1936Regulation of transmission linesCOWAN FRANK A.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2060008November 10, 1936Two-way signaling systemABRAHAM LEONARD GLADSTONEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2061227November 17, 1936Signaling systemEDWARDS WILLIAM HAMERICAN TELEPHONE & TELEGRAPH
2061027November 17, 1936Communication with moving trainsLLOYD ESPENSCHIED ; NEWTON MONKAMERICAN TELEPHONE & TELEGRAPH
2060843November 17, 1936Transmission systemABRAHAM LEONARD G ; GRENELL ARTHUR FAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
2063187December 8, 1936Method of cable maintenanceNYQUIST HARRYAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2063148December 8, 1936Reproduction of soundBISCHOFF CHARLES FREDERICK ; HERCKMANS ALFREDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064540December 15, 1936Automatic line level regulation of multiple channel television systemsHERMAN JOSEPHAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064961December 22, 1936Common medium multichannel exchange systemTIDD WARREN HITCHCOCKAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064958December 22, 1936Signaling system for radiotelephonesTAYLOR EDMUND R. ; TAYLOR CHARLES C. ; WADSWORTH PAUL W.BELL TELEPHONE LABORATORIES, INCORPORATED
EDMUND R. TAYLOR
CHARLES C. TAYLOR
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064938December 22, 1936Common medium multichannel exchange systemMONK NEWTONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064907December 22, 1936Common medium multichannel exchange systemGREEN ESTILL I.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064906December 22, 1936Common medium multichannel exchange systemGREEN ESTILL I. ; TIDD WARREN H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064905December 22, 1936Common medium multichannel exchange systemGREEN ESTILL IBBOTSONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064904December 22, 1936Common medium multichannel exchange systemGREEN ESTILL I.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064896December 22, 1936Common medium multichannel exchange systemESPENSCHIED LLOYD ; GREEN ESTILL I.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064895December 22, 1936Common medium multichannel exchange systemESPENSCHIED LLOYD ; MONK NEWTONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2064894December 22, 1936Common medium multichannel exchange systemESPENSCHIED LLOYDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2065765December 29, 1936Electrical protective systemSWART LELAND KASSONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2065642December 29, 1936Combined telephone and fire dispatch systemBRADFORD RAYMOND C.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2065640December 29, 1936Carrier telegraph receiverBORGESON CARL ANDERSAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2066491January 5, 1937SwitchSHEATSLEY PAUL WEIDNERAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2066490January 5, 1937SwitchSHEATSLEY PAUL WEIDNERAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2066465January 5, 1937SwitchFRIEND OTTO A.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2067696January 12, 1937Oscillographic apparatusCRAMPTON DAVIDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2067320January 12, 1937Measuring system for program circuit maintenanceHAMILTON HAROLD S.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2068309January 19, 1937Transmission measuring systemAFFEL HERMAN A. ; BEST FRED H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2068293January 19, 1937Means for producing time lag in electrical circuitsILGENFRITZ LESTER M.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2069038January 26, 1937Telephone subscriber's substationLABAUGH JAMES MONROEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2069000January 26, 1937Telegraph systemMEREDITH BACON WALTERAMERICAN TELEPHONE & TELEGRAPH
2069394February 2, 1937Alarm circuitSTEVENSON WILLIAMAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2069369February 2, 1937Secret communication systemHUNTER RUSSELL NORMANAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2069932February 9, 1937Electrical systemTYLEE WINTRINGHAM WILLIAMAMERICAN TELEPHONE & TELEGRAPH
2069915February 9, 1937Signaling systemEDWARDS WILLIAM HOPPLE ; HALLIGAN CLAIR WILLIAMAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2070750February 16, 1937Regulator systemTREAT REA WILTONAMERICAN TELEPHONE & TELEGRAPH
2070744February 16, 1937Crosstalk reduction in communication systemsNYQUIST HARRYAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2070732February 16, 1937Radio receiving systemHOLDEN WILLIAM H. T.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2071476February 23, 1937Telegraph systemTHORP VAUGHN PENFOLDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2072287March 2, 1937Telephone transmission circuitWRIGHT SUMNER BISBEEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2072227March 2, 1937Signaling system for voice and telegraph operationTAYLOR EDMUND RANDOLPH ; MITCHELL DORENAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2073030March 9, 1937Guy clamp holderJR. JOSEPH J. SEFCIK,AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2073003March 9, 1937Switchboard cord circuitDARROW WIRT EDWARDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2073983March 16, 1937Registering systemANDERSON EMIL N.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2073756March 16, 1937Timing mechanismOSTEN-SACKEN IRVING CHARLESAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2073752March 16, 1937Telephone systemNORTON JOHN ERNESTAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2074358March 23, 1937Vehicle coverBIXEL EDWARD CARL ; SMITH TEMPLE CLIFFORDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2075422March 30, 1937Telegraph systemBRANSON DAVID ERNEST ; HOLDEN WILLIAM HENRY TOWNE ; EYSTER JAMES ALISONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2075103March 30, 1937Apparatus for converting continuous motioninto interrupted motionEDWARDS PAUL GRIFFITH ; SHOFFSTALL HUGH FRANKLINAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2075927April 6, 1937Shielding systemBOWEN ARNOLD EVERETTAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2075920April 6, 1937Shielding systemWASCHECK GEORGEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2076651April 13, 1937Telephone systemKUHN GEORGE WILLIAMAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2076637April 13, 1937Telephone substation apparatusHARLOW LEONARD M. ; MAPES CHARLES M.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2077537April 20, 1937System for tracing telephone callsTAYLOR JOHN W.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2077510April 20, 1937Spring contact gaugeBOEHLER JOHN D. ; SIDUR ROBERT ALEXANDERAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2079723May 11, 1937Electrical protective systemSWART LELAND KASSONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2080527May 18, 1937Ladder holderBIXEL EDWARD CARLAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2080524May 18, 1937Paper feeding apparatus for typing devicesALLEN HOWARD D.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2081312May 25, 1937Carrier telegraph systemTHORP VAUGHN P.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2082104June 1, 1937Testing systemGIBSON EARL S. ; HANSEN ARNOLD A. ; WORTH JOHN B.BELL TELEPHONE LABORATORIES, INCORPORATED
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2082077June 1, 1937Selective signaling systemNEWBY NEAL DOW ; MOODY DWIGHT LYMANAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2082075June 1, 1937Printing telegraph systemMOWTON EDWARD M.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2082924June 8, 1937Printing telegraph systemWATSON EDWARD FISKAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2082911June 8, 1937SwitchSCHNECKLOTH HARRY HOWARDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2082877June 8, 1937Multiplex communication signaling systemDURAND SAMUEL RELFAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2084121June 15, 1937Prepayment telephone systemANDERSON EMIL N. ; BASCOM HENRY M. ; GETZ EMIL L. ; JR. GEORGE SANDALLS,AMERICAN TELEPHONE AND TELEGRAPH COMPANY
BELL TELEPHONE LABORATORIES, INCORPORATED
2083666June 15, 1937High frequency signaling systemKIMBALL POTTER RALPHAMERICAN TELEPHONE & TELEGRAPH
2083645June 15, 1937Transmission systemDARIO FRACASSI RENATOAMERICAN TELEPHONE & TELEGRAPH
2084457June 22, 1937Transmission systemLIONEL SCHOTTAMERICAN TELEPHONE & TELEGRAPH
2084422June 22, 1937Telephone transmission circuitBISBEE WRIGHT SUMNERAMERICAN TELEPHONE & TELEGRAPH
2085639June 29, 1937Transmission regulation systemCOWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
2085637June 29, 1937Teletypewriter exchange systemCOLLINS CLARENCE VAMERICAN TELEPHONE & TELEGRAPH
2085175June 29, 1937TeletypewriterEDWIN THORNTON FLOYDAMERICAN TELEPHONE & TELEGRAPH
2085141June 29, 1937Testing circuit for telephone systemsCARL BIERSTEDT GUSTAVAMERICAN TELEPHONE & TELEGRAPH
2086683July 13, 1937Gas tube circuits for measuring short-lived impulsesKASSOV SWART LCLANDAMERICAN TELEPHONE & TELEGRAPH
2086679July 13, 1937Telegraph systemTREAT REA WILTONAMERICAN TELEPHONE & TELEGRAPH
2087352July 20, 1937Signaling systemDOREN MITCHELL ; ABRAHAM LEONARD GAMERICAN TELEPHONE & TELEGRAPH
2087340July 20, 1937Electrical protective systemFENNER DAVIS ROWLANDAMERICAN TELEPHONE & TELEGRAPH
2087950July 27, 1937Electrical attenuatorTOWNE HOLDEN WILLIAM HENRYAMERICAN TELEPHONE & TELEGRAPH
2087949July 27, 1937Electrical attenuatorHOLDEN WILLIAM H TAMERICAN TELEPHONE & TELEGRAPH
2088722August 3, 1937Vacuum tube with tank circuitsKIMBALL POTTER RALPHAMERICAN TELEPHONE & TELEGRAPH
2088702August 3, 1937Transmission measuring apparatusHOPPESCH JOHN WAMERICAN TELEPHONE & TELEGRAPH
2092861September 14, 1937Oscillation generating circuits including gas-filled tubeSWART LOLAND KAMERICAN TELEPHONE & TELEGRAPH
2092851September 14, 1937Resetting circuits for gas-filled tubesOSGOOD DEXTER TAMERICAN TELEPHONE & TELEGRAPH
2093525September 21, 1937Echo suppressor apparatusDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
2093512September 21, 1937Electrical measuring systemEVERETT BOWEN ARNOLDAMERICAN TELEPHONE & TELEGRAPH
2094116September 28, 1937Earth resistivity measurementEVERET BOWEN ARNOLDAMERICAN TELEPHONE & TELEGRAPH
2094113September 28, 1937Wave transmissionAFFEL HERMAN AAMERICAN TELEPHONE & TELEGRAPH
2094701October 5, 1937Distortion measuring device for telegraph systemsHARMS GORDON JAMERICAN TELEPHONE & TELEGRAPH
2094574October 5, 1937LockNATHANIEL ANDERSON EMILAMERICAN TELEPHONE & TELEGRAPH
2095360October 12, 1937Television systemGREEN ESTILL IAMERICAN TELEPHONE & TELEGRAPH
2095341October 12, 1937Electrooptical transmission systemPIERRE MERTZAMERICAN TELEPHONE & TELEGRAPH
2096145October 19, 1937TeletypewriterSTEVENS SWEZEY BURDETTEAMERICAN TELEPHONE & TELEGRAPH
2096143October 19, 1937Electrical protective systemKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2096108October 19, 1937Teletypewriter switching systemWILLIAM HOINKISAMERICAN TELEPHONE & TELEGRAPH
2096865October 26, 1937Resetting circuits for gas-filled tubesKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2096841October 26, 1937Telegraph systemERNEST BRANSON DAVID ; TOWNE HOLDEN WILLIAM HENRY ; ALISON EYSTER JAMESAMERICAN TELEPHONE & TELEGRAPH
2097578November 2, 1937Apparatus for recording steep wave front voltages of short durationKASSON SWART LELAND ; WILLIAM BODLE DAVIDAMERICAN TELEPHONE & TELEGRAPH
2097562November 2, 1937Portable pole stepDAY LESTER SCOTTAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2098350November 9, 1937Control of signaling circuitsDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
2098329November 9, 1937Maintenance of program transmission circuitsANDREW AFFEL HERMANAMERICAN TELEPHONE & TELEGRAPH
2099089November 16, 1937RelayALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
2099065November 16, 1937Distributor deviceTOWNE HOLDEN WILLIAM HENRYAMERICAN TELEPHONE & TELEGRAPH
2099800November 23, 1937Shielded circuits for open wire linesLLOYD ESPENSCHIED ; EVERDELL CURTIS HAROLDAMERICAN TELEPHONE & TELEGRAPH
2099771November 23, 1937Printing telegraph systemTREAT REA WILTONAMERICAN TELEPHONE & TELEGRAPH
2099769November 23, 1937Circuits embodying negative impedanceHARRY NYQUISTAMERICAN TELEPHONE & TELEGRAPH
2101224December 7, 1937Privacy systemSMITH OSBORNE HAROLD ; BISBEE WRIGHT SUMNERAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
2101209December 7, 1937Signaling systemMEREDITH BACON WALTERAMERICAN TELEPHONE & TELEGRAPH
2101995December 14, 1937Telegraph switching systemADAMS GARDNER LELAND ; JOHN SINGER FREDAMERICAN TELEPHONE & TELEGRAPH
2101976December 14, 1937Television systemBLACKWELL OTTO B ; JOSEPH HERMANAMERICAN TELEPHONE & TELEGRAPH
2102735December 21, 1937Carrier telegraph systemNEISWINTER JAMES TAMERICAN TELEPHONE & TELEGRAPH
2102708December 21, 1937Signal testing apparatusHOWLE LOUIS WAMERICAN TELEPHONE & TELEGRAPH
2103439December 28, 1937Gas-filled tubeKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2103430December 28, 1937Electrical protective systemMAURER KEITH L ; SWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
2104142January 4, 1938Gas-filled tube circuitsKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2104128January 4, 1938Gas discharge tube delay circuitKARL HONAMAN RICHARD ; KASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2104861January 11, 1938Vacuum tube circuitsGANNETT DANFORTH KAMERICAN TELEPHONE & TELEGRAPH
2104844January 11, 1938Vacuum tube circuitANDREW AFFEL HERMANAMERICAN TELEPHONE & TELEGRAPH
2105592January 18, 1938Educational deviceALBRO HATHAWAY LLOYD ; FAY HARRY HAMERICAN TELEPHONE & TELEGRAPH
2105587January 18, 1938Earth boring machineEUGENE DARNELL ; ENOCH HENRY L ; GRUBB JOEL N ; FREEMAN ALBERT EAMERICAN TELEPHONE & TELEGRAPH
2106286January 25, 1938Gas-filled tube circuitsKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2106805February 1, 1938TeletypewriterLANG WILMARTH Y ; WATSON EDWARD FBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
2106771February 1, 1938Ultrahigh frequency signalingCLARK SOUTHWORTH GEORGEAMERICAN TELEPHONE & TELEGRAPH
2106769February 1, 1938Transmission of guided wavesSOUTHWORTH GEORGE CAMERICAN TELEPHONE & TELEGRAPH
2106768February 1, 1938Filter system for high frequency electric wavesSOUTHWORTH GEORGE CAMERICAN TELEPHONE & TELEGRAPH
2106725February 1, 1938Dielectric guide systemEVERDELL CURTIS HAROLDAMERICAN TELEPHONE & TELEGRAPH
2107387February 8, 1938Vacuum tube with tank circuitsKIMBALL POTTER RALPHAMERICAN TELEPHONE & TELEGRAPH
2107373February 8, 1938Apparatus for converting continuous motion into interrupted motionGRIFFITH EDWARDS PAULAMERICAN TELEPHONE & TELEGRAPH
2108219February 15, 1938Gas tube circuitsSWART LELAND KAMERICAN TELEPHONE & TELEGRAPH
2108186February 15, 1938Two-way signaling systemGLADSTONE ABRAHAM LEONARDAMERICAN TELEPHONE & TELEGRAPH
2109026February 22, 1938Telegraph repeating systemMCCANN THOMAS AAMERICAN TELEPHONE & TELEGRAPH
2108974February 22, 1938Two-way signaling systemLIONEL SCHOTTAMERICAN TELEPHONE & TELEGRAPH
2109562March 1, 1938Transmission systemBARNARD BAGNALL VERNONAMERICAN TELEPHONE & TELEGRAPH
2109557March 1, 1938Signal transmission systemCHANCE TAYLOR CHARLESAMERICAN TELEPHONE & TELEGRAPH
2110536March 8, 1938Electrical protection apparatusKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2110260March 8, 1938Telegraph systemBURGESS MONTAGUE STEPHEN ; CLARK ALVA BENSONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2111023March 15, 1938Noise and cross-talk reduction in telephone communication circuitsTILLOTSON DIXON JOHNAMERICAN TELEPHONE & TELEGRAPH
2110932March 15, 1938Signaling systemHOPPLE EDWARDS WILLIAMAMERICAN TELEPHONE & TELEGRAPH
2111685March 22, 1938Telegraph broadcasting systemROBERT WALKER CHARLESAMERICAN TELEPHONE & TELEGRAPH
2112328March 29, 1938Gas-filled tubeBODLE DAVID W.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2112327March 29, 1938Gas-filled tubeBODLE DAVID WAMERICAN TELEPHONE & TELEGRAPH
2113713April 12, 1938Warning device for manholesSLOCUM HARVEY FRANCISAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2113708April 12, 1938Transmission systemANGELL PARROTT JOHNAMERICAN TELEPHONE & TELEGRAPH
2115917May 3, 1938Picture transmitting systemSHANCK ROY BAMERICAN TELEPHONE & TELEGRAPH
2115894May 3, 1938Apparatus and method for the electrical transmission of picturesWATSON EDWARD F.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2117052May 10, 1938Telegraph tape comparatorAUSTIN BAILEY ; ADDISON MCCANN THOMASAMERICAN TELEPHONE & TELEGRAPH
2118471May 24, 1938Electrical transmission systemNEWTON MONK ; TIDD WARREN HAMERICAN TELEPHONE & TELEGRAPH
2119203May 31, 1938Combined form and carbon sheet holderDENCKLAU KARL RAMERICAN TELEPHONE & TELEGRAPH
2120235June 14, 1938Teletypewriter systemFRANCIS BEATTIE JAMES ; JEROME CUNNINGHAM HAROLD ; RICHARD ROYCROFT WALTERWESTERN ELECTRIC CO
AMERICAN TELEPHONE & TELEGRAPH
2121498June 21, 1938Call distributing telephone systemDUNNING SANFORD FAMERICAN TELEPHONE & TELEGRAPH
2121287June 21, 1938Composite setAUGUSTUS COWAN FRANKAMERICAN TELEPHONE & TELEGRAPH
2121282June 21, 1938Combined telephone and fire alarm systemCARTER BRADFORD RAYMONDAMERICAN TELEPHONE & TELEGRAPH
2121935June 28, 1938Amplifying systemKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2121916June 28, 1938Combined guide and guard for wiresLINDON JACOBSEN MORRIS HENDRICAMERICAN TELEPHONE & TELEGRAPH
2122538July 5, 1938Wave amplifierPOTTER RALPH KAMERICAN TELEPHONE & TELEGRAPH
2123874July 19, 1938Crystal oscillator receiving systemAUSTIN BAILEYAMERICAN TELEPHONE & TELEGRAPH
2124599July 26, 1938Electrical network systemNORBERT WIENER ; YUK-WING LEEAMERICAN TELEPHONE & TELEGRAPH
2126538August 9, 1938Carbon sheet and loose form holderDENCKLAU KARL RAMERICAN TELEPHONE & TELEGRAPH
2126535August 9, 1938Teletypewriter systemCORWIN THOMAS L ; SWEZEY BURDETTE S ; WATSON EDWARD FBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
2128257August 30, 1938Electrical network systemYUK-WING LEE ; NORBERT WIENERAMERICAN TELEPHONE & TELEGRAPH
2129876September 13, 1938Card holderNIGHTINGALE RUMBOLD WILLIAMAMERICAN TELEPHONE & TELEGRAPH
2129823September 13, 1938Distortion indicating and measuring deviceAUGUSTUS COWAN FRANKAMERICAN TELEPHONE & TELEGRAPH
2129714September 13, 1938Wave type converter for use with dielectric guidesSOUTHWORTH GEORGE CAMERICAN TELEPHONE & TELEGRAPH
2129712September 13, 1938Transmission of energy effects by guided electric waves in a dielectric mediumSOUTHWORTH GEORGE CAMERICAN TELEPHONE & TELEGRAPH
2129711September 13, 1938Guided transmission of ultra high frequency wavesCLARK SOUTHWORTH GEORGEAMERICAN TELEPHONE & TELEGRAPH
2130464September 20, 1938Means for shifting strands and cables on polesLINDON JACOBSEN MORRIS HENDRICAMERICAN TELEPHONE & TELEGRAPH
2132180October 4, 1938Two-way signaling systemDOREN MITCHELLAMERICAN TELEPHONE & TELEGRAPH
2132684October 11, 1938Printing telegraph automatic exchange systemGARDNER LELAND AAMERICAN TELEPHONE & TELEGRAPH
2132678October 11, 1938Signal distortion measuring deviceCOWAN FRANK AAMERICAN TELEPHONE & TELEGRAPH
2133384October 18, 1938System and method for identification of conductors in cablesDONALD FISHER ; BLAINE PARKER GEORGEAMERICAN TELEPHONE & TELEGRAPH
2133380October 18, 1938Communication systemWARNER DEARDORFF RALPHAMERICAN TELEPHONE & TELEGRAPH
2134076October 25, 1938Teletypewriter systemDUNCAN JAMES ARCHIBALDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2134068October 25, 1938Start-stop printing telegraph systemCYRUS WILLIAMS HOLLIEAMERICAN TELEPHONE & TELEGRAPH
2134823November 1, 1938Ladder holderSTEPHAN CHARLES ; OTT FRANK JOSEPHAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2134820November 1, 1938Telegraph repeaterHANLEY FRANK H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2136984November 15, 1938Impulse transmitting systemWEBB SMITH CHAUNCEYAMERICAN TELEPHONE & TELEGRAPH
2137793November 22, 1938Telephone systemANDERSON EMIL N ; GETZ EMIL L ; ULRICH HORACE WAMERICAN TELEPHONE & TELEGRAPH
BELL TELEPHONE LABOR INC
2137349November 22, 1938Radio receiving systemGEORGE REZOSAMERICAN TELEPHONE & TELEGRAPH
2137325November 22, 1938Wire tying toolANDERSON FRED IAMERICAN TELEPHONE & TELEGRAPH
2138186November 29, 1938Telephone systemBALLI MCDAVITT MARCELLUSAMERICAN TELEPHONE & TELEGRAPH
2138147November 29, 1938Time of day announcing systemFREDERICK DRUM GEORGEAMERICAN TELEPHONE & TELEGRAPH
2138966December 6, 1938Radio compass systemHAFNER GILBERT MARKAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2138963December 6, 1938Level compensator for telegraph systemsGANNETT DANFORTH KINGAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2139800December 13, 1938Telephone switchboard switching systemBONORDEN ALLEN RUDOLFAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2139799December 13, 1938Telegraph switchboard switching systemBONORDEN ALLEN RUDOLFAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2139798December 13, 1938Telegraph switchboard switching systemBONORDEN ALLEN R. ; CARTER FRANK J. ; HANLEY FRANK H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2140680December 20, 1938Telegraph testing setRHODES HAROLD ANSONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2140673December 20, 1938Telegraph systemGREENE MONTE LEE ; RHOADS WILLIAM LOCKWOODAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2141282December 27, 1938Wave transmissionSOUTHWORTH GEORGE CLARK ; WILLIS FRENCH HOKEAMERICAN TELEPHONE & TELEGRAPH COMPANY
2141281December 27, 1938Wave transmissionSOUTHWORTH GEORGE CLARKAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2142339January 3, 1939Picture broadcasting systemWEAVER ALLANAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2142290January 3, 1939Duct rodding equipmentSLOCUM HARVEY FRANCISAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2143992January 17, 1939Electrical protective systemMAURER KEITH LANGDON ; SWART LELAND KASSONAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2143971January 17, 1939Telephone systemBRAZELTON ROY MELVILLEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2144710January 24, 1939Gain adjusting apparatusROMNES HAAKON INGOLFAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2144709January 24, 1939Gain adjusting apparatusROMNES HAAKON INGOLFAMERICAN TELEPHONE & TELEGRAPH COMPANY
2145618January 31, 1939KeyNATHANIEL ANDERSON EMILAMERICAN TELEPHONE & TELEGRAPH
2153128April 4, 1939Selective signaling systemBACHELET ALBERT E ; HOLDEN WILLIAM H TBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
2153087April 4, 1939MoldSAMUEL KNAPP HOWARDAMERICAN TELEPHONE & TELEGRAPH
2153072April 4, 1939Means for suspending aerial cablesCOLEMAN BOOKOUT ARCHIE ; BAXTER PITTS FREDERICKAMERICAN TELEPHONE & TELEGRAPH
2153728April 11, 1939Ultra high frequency signalingCLARK SOUTHWORTH GEORGEAMERICAN TELEPHONE & TELEGRAPH
2153706April 11, 1939Privacy testing systemCLARK BASCOM EARLEAMERICAN TELEPHONE & TELEGRAPH
2154886April 18, 1939Selective signaling systemBACHELET ALBERT E ; HOLDEN WILLIAM H TBELL TELEPHONE LABOR INC
AMERICAN TELEPHONE & TELEGRAPH
2154594April 18, 1939Multiplex carrier wave transmissionALEXANDER WEAVER MYRONAMERICAN TELEPHONE & TELEGRAPH
2154592April 18, 1939Teletypewriter automatic switching systemFISK WATSON EDWARDAMERICAN TELEPHONE & TELEGRAPH
2154579April 18, 1939Telephone conference circuitANGELL PARROTT JOHNAMERICAN TELEPHONE & TELEGRAPH
2154547April 18, 1939Teletypewriter systemWALKER CHARLES RAMERICAN TELEPHONE & TELEGRAPH
2160206May 30, 1939Telegraph system, open morse telegraph key alarm circuitHAROLD HANLEY FRANKAMERICAN TELEPHONE & TELEGRAPH
2161376June 6, 1939Telephone systemLYMAN MOODY DWIGHT ; DOW NEWBY NEAL ; FOSTER SHIPLEY FRANKAMERICAN TELEPHONE & TELEGRAPH
2161006June 6, 1939CabscopeCARL BIXEL EDWARD ; BROWN HOWARD DAMERICAN TELEPHONE & TELEGRAPH
2163221June 20, 1939Manhole structureFRANCIS SLOCUM HARVEYAMERICAN TELEPHONE & TELEGRAPH
2163195June 20, 1939Mechanical relayGRIFFITH EDWARDS PAULAMERICAN TELEPHONE & TELEGRAPH
2165892July 11, 1939Multiplex telemetering systemIBBOTSON GREEN ESTILL ; HITCHCOCK TIDD WARRENAMERICAN TELEPHONE & TELEGRAPH
2165883July 11, 1939Wire wrapping toolCARTER IRVING GAMERICAN TELEPHONE & TELEGRAPH
2170038August 22, 1939Telephone and telegraph exchange systemSINGER FRED JOHNAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2171542September 5, 1939Telegraph systemCUNNINGHAM HAROLD JEROME ; DOUGLASS LLOYD RICHMOND ; DUNCAN JAMES ARCHIBALD ; WALKER CHARLES ROBERTAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2172913September 12, 1939Paper-feeding deviceROSE CLAUDE C.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2173335September 19, 1939Telegraph exchange systemKINKEAD FULLERTON S. ; SINGER FRED J.BELL TELEPHONE LABORATORIES, INCORPORATED
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2173327September 19, 1939Method of repairing cable terminal binding postsCHANNELL JAMES W.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2175388October 10, 1939Picture broadcasting systemGURLEY ROGER KNIGHTAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2181668November 28, 1939Telephone switchboardPETERSON GEORGE HARRYAMERICAN TELEPHONE AND TELEGRAPH COMPANY
2184916December 26, 1939Start-stop printing telegraph systemWELLS HOWLE LOUISAMERICAN TELEPHONE & TELEGRAPH
2184912December 26, 1939Cable and wire laying machineEDWARD FREEMAN ALBERT ; CLIFFORD SMITH TEMPLEAMERICAN TELEPHONE & TELEGRAPH
2184907December 26, 1939Telephone ringing systemCAMPBELL JR JAMESAMERICAN TELEPHONE & TELEGRAPH
2189119February 6, 1940Signal measuring systemJONATHAN SCHLUTER JOHNAMERICAN TELEPHONE & TELEGRAPH
2189111February 6, 1940Signal measuring systemBETTLE HUGHES SAMUELAMERICAN TELEPHONE & TELEGRAPH
2189110February 6, 1940Voltage recording deviceKARL HONAMAN RICHARD ; KASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2189102February 6, 1940Printing telegraph apparatusDE WOLFE DONALD FRASERAMERICAN TELEPHONE & TELEGRAPH
2190552February 13, 1940Gas tube circuitKASSON SWART LELANDAMERICAN TELEPHONE & TELEGRAPH
2190546February 13, 1940Control circuit for radio receiversTHEODORE LAUBE OTTOAMERICAN TELEPHONE & TELEGRAPH
2190540February 13, 1940Printing telegraph systemMICHAEL DESMOND JAMESAMERICAN TELEPHONE & TELEGRAPH
2198550April 23, 1940Teletypewriter tape wiperBARRY MATHEWS ERICAMERICAN TELEPHONE & TELEGRAPH
2198517April 23, 1940Printing telegraph private branch exchange systemJOHN SINGER FREDAMERICAN TELEPHONE & TELEGRAPH
2201089May 14, 1940Coin collecting apparatusMARION HANCOCK CHARLESAMERICAN TELEPHONE & TELEGRAPH
2206453July 2, 1940Telegraph testing apparatusALLAN WEAVERAMERICAN TELEPHONE & TELEGRAPH
2207314July 9, 1940Communication systemJEROME CUNNINGHAM HAROLD ; EDMUND GROOME PRESTON ; HAROLD HANLEY FRANK ; WATSON RICHARDS KENNETHAMERICAN TELEPHONE & TELEGRAPH
2208192July 16, 1940Teletypewriter systemMARTIN WADE BAMERICAN TELEPHONE & TELEGRAPH
2208168July 16, 1940Teletypewriter apparatusGEORGE SKIBSTED WESLEYAMERICAN TELEPHONE & TELEGRAPH
2208164July 16, 1940Registering deviceAUGUSTUS SAGEMAN EDWARDAMERICAN TELEPHONE & TELEGRAPH
2208953July 23, 1940Noise reducing receiving systemWEBER JR EDWARD HENRYAMERICAN TELEPHONE & TELEGRAPH
2212290August 20, 1940Apparatus for transferring cable circuitsDONALD FISHER ; BLAINE PARKER GEORGE ; PARKER LLOYD L ; PHILLIP MEEHAN JOHNAMERICAN TELEPHONE & TELEGRAPH
2213105August 27, 1940Radio control systemTHEODORE LAUBE OTTOAMERICAN TELEPHONE & TELEGRAPH
2213363September 3, 1940Means for lashing cables to supporting strandsEDWARD CRESWELL CHARLESAMERICAN TELEPHONE & TELEGRAPH
2216650October 1, 1940Telephone lineFRANCIS NELSON CHARLESAMERICAN TELEPHONE & TELEGRAPH
2221136November 12, 1940Telegraph systemJOHN HARMS GORDONAMERICAN TELEPHONE & TELEGRAPH
2221129November 12, 1940Telegraph distortion measuring systemAUGUSTUS COWAN FRANK ; ANSON RHODES HAROLDAMERICAN TELEPHONE & TELEGRAPH
2224277December 10, 1940Antenna selector switchROARK TALLEY ROBERTAMERICAN TELEPHONE & TELEGRAPH
2224275December 10, 1940Apparatus for producing a currentFERGUSON ROUGVIE JAMESAMERICAN TELEPHONE & TELEGRAPH
2224250December 10, 1940Communication systemANDERS BORGESON CARL ; CARTER FRANK J ; ROBERT DRAKE GEORGE ; EDMUND GROOME PRESTON ; HAROLD HANLEY FRANKAMERICAN TELEPHONE & TELEGRAPH