Patent Date Title Inventor Assignee
350715October 12, 1886TELEPHONE-CIRCUIT.JOHN A. BAEKETT, OFTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK, N. Y.
371557October 18, 1887MEANS FOR PREVENTING INDUCTION ON ELECTRICAL CONDUCTORS.STEPHEN C. DREW, OF MASSACHUSETTSTHE AMERICAN TELEPHONE IMPROVEMENT COMPANY, OP MAINE.
397331February 5, 1889TELEPHONE CIRCUIT AND APPARATUS.JOHN A. BARRETT, OF NEW YORKTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
405677June 18, 1889TELEPHONE COMBINATION-CIRCUIT.FRANK A. PICKERNELL, OP NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK, N. Y.
453863June 9, 1891DISTRIBUTING-FRAME FOR ELECTRIC CONDUCTORS.ANGUS S. IIIBBARD, OF NEW JERSEYTHI AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
469995March 1, 1892ELECTRO-MAGNETIC ANNUNCIATOR.FRANCIS W. DUNBAR, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
476618June 7, 1892APPARATUS AND SYSTEM FOR COMPOUND TELEGRAPHY AND TELEPHONY.FRANCIS W. DTJNBAR, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
481120August 16, 1892ELECTRIC ANNUNCIATOR.FRANK A. PICKERNELL, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
482174September 6, 1892TELEPHONE-EXCHANGE APPARATUS.ANGUS S. HIBBARD, OF N. Y.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
491553February 14, 1893TRUNK-LINE SIGNALING APPARATUS AND CIRCUIT FOR TELEPHONE-EXCHANGES,EDWARD J. HALL, OF NEW JERSEYTHE AMERICAN-TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
492483February 28, 1893BUSY-SIGNAL FOR TELEPHONE-CIRCUITS.EDWARD J. HALL, OP AND FRANK A. PICKERNELL OP NEWARK NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
492482February 28, 1893SIGNALING APPARATUS AND CIRCUIT.EDWARD J. HALL, OF AND PRANK A. PICKERNELL OF NEWARK NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
492471February 28, 1893SYSTEM OF COMBINED TELEPHONY AND TELEGRAPHY.FRANK A. PICKERNELL, OP NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
494385March 28, 1893TELEPHONE AND SIGNALING CIRCUIT.FRANK A. PICKERNELL, OF NEW JERSEY AND FRANCIS W. DUNBAR OF NEW YORK N. Y.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
501185July 11, 1893VISIBLE SIGNAL.FRANCIS W. DUNBAR, OF N. T.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
501102July 11, 1893TELEPHONE SIGNALING APPARATUS AND CIRCUIT.FRANK A. PICKEBNELL, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
501087July 11, 1893ELECTRIC SIGNALING.THOMAS D. LOCK WOOD, OP MASSACHUSETTS AND SHERWOOD J. LARNED OF EVANSTON ILLINOISTHE AMERICAN" TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK, AND THE AMERICAN BELL TELEPHONE COMPANY,
501086July 11, 1893STATION APPARATUS FOR TELEPHONE-CIRCUITS.SHERWOOD J. LARNED, OF ILLINOIS AND FRANK A. PICKER-NELL OF NEWARK NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
501085July 11, 1893TELEPHONE CIRCUIT AND APPARATUS.SHERWOOD J. LARNED, OF ILLINOIS AND FRANK A. PICKER-NELL OF NEWARK NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
502660August 1, 1893ELECTRIC SWITCHBOARD-SIGNAL.FRANCIS W. DUNBAR, OF N. Y.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
503252August 15, 1893ELECTRIC SWITCHBOARD-SIGNAL.FRANK A. PICKERNELL, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
506884October 17, 1893APPARATUS FOR SUPPRESSING TELEPHONE DISTURBING-CURRENTS.FRANK A. PICKERNELL, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
506883October 17, 1893VISIBLE SIGNAL.FREDERIC S. PERRIN, OF N. Y.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
509367November 28, 1893SWITCHBOARD-CIRCUIT AND SIGNALING APPARATUS.FRANCIS W. DUNBAR AND EDMUND S. C. MAY, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
520365May 22, 1894VISIBLE SSGNAL DEVICE.WILLIAM II. LANE, OF AND FREDERIC S. PERRIN OF NEW YORK N. Y.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
534373February 19, 1895TELEPHONE AND SIGNALING CIRCUIT.FRANK A. PICKERNELL, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
553605January 28, 1896COMPOSITE TELEGRAPHIC AND TELEPHONIC TRANSMISSION.EDWARD E. BACKUS, OF N. Y.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OE NEW YORK.
558310April 14, 1896APPARATUS FOR COMPOSITE TRANSMISSION OF INTELLIGENCE.FRANK A. PICKERNELL, OP NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OP NEW YORK.
560861May 26, 1896MULTIPLE TELEPHONY.FRANK A. PICKERNELL, OP NEW JERSEY AND FREDERIC S. PERRIN OF NEW YORK N. Y.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
582107May 4, 1897SELECTIVE SIGNALING CIRCUIT, APPARATUS, AND SYSTEM.GEOEGE W. WIIITTEMORE AND JOHN A. BARRETT, OF AND WARREN M. CRAFT OF NEW YORK N. Y.THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY OF NEW YORK.
592769November 2, 1897METHOD OF AND APPARATUS FOR RELAYING TELEPHONIC MESSAGES,ALBERT W. ERDMAN, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
594979December 7, 1897TELEPHONIC SELECTIVE SIGNALING.JOHN" A. BARRETT, OF NEW YORKTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OP NEW YORK.
596036December 21, 1897AUXILIARY APPARATUS FOR SELECTIVE ELECTRICAL SIGNALS.GEORGE W. WHITTEMORE, OF NEW YORKTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
626132May 30, 1899SELECTIVE PRIVACY-SWITCH FOR MULTIPLE-STATION TELEPHONE-LINES,JOHN A. BARRETT, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OF NEW YORK.
626131May 30, 1899SELECTIVE ELECTRIC SIGNAL.JOHN A. BARRETT, OF NEW JERSEYTHE AMERICAN TELEPHONE AND TELEGRAPH COMPANY, OP NEW YORK.
637846November 28, 1899ELECTRICAL AND SELECTIVE SIGNALING.BARRETT JOHN A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
663783December 11, 1900SELECTIVE-SIGNAL SYSTEM.PICKERNELL FRANK A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
666457January 22, 1901PRIVACY-DEVICE APPARATUS FOR POLYSTATION TELEPHONE-LINES.BARRETT JOHN A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
667327February 5, 1901TELEPHONE-TRANSMITTER.LIDBERG TIODOLF -SWEDISH AMERICAN TELEPHONE COMPANY, United States of America (US)
668967February 26, 1901SELECTIVE SIGNALING APPARATUS.BARRETT JOHN A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
681603August 27, 1901MECHANICAL INTERCOMMUNICATION BETWEEN TELEPHONE-SWITCHBOARDS.YORKE GEORGE M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
692471February 4, 1902ELECTRIC ANNUNCIATOR.OVERSHINER ELSWORTH B -SWEDISH AMERICAN TELEPHONE COMPANY, United States of America (US)
705936July 29, 1902LOADED ELECTRIC CIRCUIT.LEE JOHN C - ; COLPITTS EDWIN H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
705935July 29, 1902MAGNETIC CORE FOR INDUCTANCE-COILS.LEE JOHN C - ; COLPITTS EDWIN H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
705686July 29, 1902TELEPHONY.LYONS JOSEPH -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
705685July 29, 1902TELEPHONY.LYONS JOSEPH -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
708539September 9, 1902VIBRATORY-CURRENT RELAY.FELL JOHN M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
709437September 16, 1902APPARATUS FOR COMPOSITE SYSTEMS OF SIMULTANEOUS TELEGRAPHY AND TELEPHONY.FELL JOHN M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
712801November 4, 1902SWITCHBOARD AND SUPERVISORY SIGNAL CIRCUIT.HULFISH DAVID S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
712766November 4, 1902COMPOSITE TRANSMISSION OVER LOADED ELECTRIC CIRCUITS.COLPITTS EDWIN H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
716779December 23, 1902TELEPHONE-TRANSMITTER CIRCUIT.STETSON ALMON B -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
719736February 3, 1903SERVICE-METER SYSTEM AND APPARATUS FOR TELEPHONE-EXCHANGES.BULLARD ALBERT M - ; FALK LOUIS A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
727829May 12, 1903CABLE-TERMINAL.O'CONNELL JOSEPH J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
729709June 2, 1903LOADED ELECTRIC CIRCUIT.WARREN HOWARD S - ; CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
733225July 7, 1903ELECTRIC BELL-RINGER.LIDBERG TIODOLF -SWEDISH AMERICAN TELEPHONE COMPANY, United States of America (US)
732795July 7, 1903SUBSTATION TELEPHONE-CIRCUIT.STETSON ALMON B -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
736033August 11, 1903MEANS FOR PROTECTING TELEPHONE CIRCUITS AND APPARATUS.STETSON ALMON B -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
736019August 11, 1903PROTECTIVE FUSE APPARATUS.RICHARDS WILTON L -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
736002August 11, 1903BUSY-TEST APPARATUS FOR TELEPHONE-SWITCHBOARDS.O'CONNELL JOSEPH J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
736672August 18, 1903TELEPHONE.BARRETT JOHN A - ; FALK LOUIS A - ; SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
737720September 1, 1903ELECTROMAGNET.DUNCAN JAMES -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
737704September 1, 1903SELF-INDUCTION COIL.CAMPBELL GEORGE A ; RICHARDS WILTON L -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
737703September 1, 1903SELF-INDUCTION COIL.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
743594November 10, 1903TELEPHONE CIRCUITS AND APPARATUS.THOMPSON GEORGE K -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
749399January 12, 1904ALTERNATING-CURRENT RELAY.GREENLEAF W. PICKARD, OF MASSACHUSETTS AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
750704January 26, 1904TELEPHONE SWITCHING AND SIGNALING APPARATUS.MALCOLM C. EOETY, OF MASSACHUSETTS AMERICAN TELEPHONE AND TELEGEAPH COMPANY, A COEPO- EATION OF NEW YORK.
753918March 8, 1904POLARIZED RELAY.RORTY MALCOLM C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
756296April 5, 1904SELECTIVE SIGNALING FOR POLYSTATION TELEPHONE-CIRCUITS.STRYKER BURDETT -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
758468April 26, 1904ALTERNATING-CURRENT SIGNAL-RECEIVING APPARATUS.PICKARD GREENLEAF W -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
760143May 17, 1904APPARATUS FOR AMPLIFYING OR REINFORCING TELEPHONE-CURRENTS.O'CONNELL JOSEPH J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
761916June 7, 1904PROTECTIVE DEVICE FOR TELEPHONE-CIRCUITS.RORTY MALCOLM C - ; THOMPSON GEORGE K -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
762820June 14, 1904ELECTRIC TELEPHONE.GUNDLACH ERNST -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
762341June 14, 1904EARTH OR GROUND WIRE ATTACHMENT.O'CONNELL JOSEPH J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
767900August 16, 1904INSULATED CONDUCTOR AND PROCESS.LEE JOHN C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
772024October 11, 1904AUTOMATIC TELEPHONE-EXCHANGE SYSTEM AND APPARATUS.BULLARD ALBERT M - ; FALK LOUIS A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
772023October 11, 1904AUTOMATIC TELEPHONE-EXCHANGE SYSTEM AND APPARATUS.BULLARD ALBERT M - ; FALK LOUIS A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
749388December 1, 1904LOCKING DEVICE FOR TELEPHONE APPARATUS.LARNED SHERWOOD J - ; FORD JAMES S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
778297December 27, 1904COMPOSITE SYSTEM DUPLEX-TELEGRAPH CIRCUITS.ATHEARN WILLIAM E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
782892February 21, 1905TELEGRAPHIC REPEATING APPARATUS.ATHEARN WILLIAM E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
786148March 28, 1905SIGNAL SYSTEM FOR ELECTRIC RAILWAYS.PICKARD GREENLEAF WHITTIER - ; FAY HAROLD J W -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
791656June 6, 1905TELEPHONE-CURRENT REINFORCER OR RELAY.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
791655June 6, 1905TELEPHONE-CURRENT REINFORCER OR RELAY.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
792248June 13, 1905INDUCTION-COIL.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
807963December 19, 1905PROTECTIVE DEVICE.PICKARD GREENLEAF WHITTIER -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
807962December 19, 1905CARBON-PLATE FOR PROTECTIVE DEVICES.PICKARD GREENLEAF WHITTIER -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
820176May 8, 1906TELEPHONE-SYSTEM.BOYCE CHARLES L -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
831131September 18, 1906MULTICONDUCTOR-CABLE.YEATMAN WALTER C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
833907October 23, 1906SIGNALING APPARATUS FOR TELEPHONE TOLL-LINES.WRAY JAMES G - ; GARDNER HERBERT T - ; KINTON WILLIAM G -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
833906October 23, 1906TELEPHONE SWITCHING AND BUSY-TEST APPARATUS.WRAY JAMES G - ; GARDNER HERBERT T - ; KINTON WILLIAM G -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
833817October 23, 1906TELEPHONE SWITCHING AND SIGNALING APPARATUS.WRAY JAMES G - ; GARDNER HERBERT T - ; KINTON WILLIAM G -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
833816October 23, 1906TELEPHONE-CIRCUIT SIGNALING APPARATUS.WRAY JAMES G - ; GARDNER HERBERT T - ; KINTON WILLIAM G -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
835037November 6, 1906TELEPHONE REPEATER CIRCUIT AND APPARATUS.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
836612November 20, 1906REGULATING DEVICE FOR TELEPHONE RELAYS AND TRANSMITTERS.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
836611November 20, 1906REGULATING DEVICE FOR TELEPHONE RELAYS AND TRANSMITTERS.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
840987January 8, 1907TELEGRAPH-RELAY.ATHEARN WILLIAM E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
845157February 26, 1907COMPOSITE TELEPHONIC AND TELEGRAPHIC CIRCUIT.YORKE GEORGE M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
851856April 30, 1907MEANS FOR NULLIFYING INDUCTIVE INTERFERENCE BETWEEN PARALLEL CIRCUITS.BLAKENEY EDWARD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
855395May 28, 1907TELEPHONE-TRANSMITTER.FALK OSCAR F -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
855394May 28, 1907TELEPHONE.FALK OSCAR F -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
863247August 13, 1907METHOD OF AND APPARATUS FOR TRANSMITTING ELECTRICAL ENERGY.YEATMAN WALTER C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
863230August 13, 1907TELEPHONE REPEATER-CIRCUIT.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
874826December 24, 1907NULLIFYING DISTURBANCES IN TELEGRAPHIC OR OTHER SIGNALING CIRCUITS.BLAKENEY EDWARD - ; CHETWOOD ROBERT E JR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
893414July 14, 1908TELEPHONE SWITCHING AND SIGNALING APPARATUS.WRAY JAMES G - ; GARDNER HERBERT T - ; KINTON WILLIAM G -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
893319July 14, 1908CABLE RAISING OR SEPARATING DEVICE.GILLESPIE ANDREW G - ; POTTER WILLIAM E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
896300August 18, 1908ELECTRICAL TESTING INSTRUMENT.JARVIS CAMERON DE WITT -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
897028August 25, 1908CIRCUIT SYSTEM FOR TELEPHONE REPEATING APPARATUS.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
898073September 8, 1908APPARATUS FOR SPEECH TRANSMISSION.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
905628December 1, 1908TELEGRAPHIC REPEATING APPARATUS.ATHEARN WILLIAM E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
907062December 15, 1908TELEPHONE-DROP.LIDBERG TIODOLF -SWEDISH AMERICAN TELEPHONE COMPANY, United States of America (US)
912908February 16, 1909TELEPHONE REPEATING APPARATUS AND CIRCUIT.SKIDMORE JOHN J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
913613February 23, 1909CALL-DISTRIBUTING TELEPHONE-EXCHANGE DETAILS.BROWNE SIDNEY HAND -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
920259May 4, 1909CALL-DISTRIBUTING TELEPHONE-EXCHANGE SYSTEM.BROWNE SIDNEY HAND -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
920258May 4, 1909SYSTEM FOR TELEPHONE-TRUNKING.BROWNE SIDNEY HAND -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
920938May 11, 1909CONCENTRATING DEVICE FOR TELEPHONE-TRANSMITTERS.FALK OSCAR F -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
927025July 6, 1909CALL-DISTRIBUTING TELEPHONE-EXCHANGE SYSTEM.BROWNE SIDNEY HAND -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
926994July 6, 1909TELEPHONE-CONNECTING APPARATUS.MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
930547August 10, 1909APPARATUS AND SYSTEM FOR MEASURING TELEPHONE SERVICE.HULFISH DAVID S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
931231August 17, 1909MOUNTING FOR TELEPHONE INSTRUMENTS.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
937189October 19, 1909TELEPHONE REPEATING SYSTEM.SHREEVE HERBERT E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
938039October 26, 1909APPARATUS AND SYSTEM FOR MEASURING TELEPHONE SERVICE.BROWNE SIDNEY HAND -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
938026October 26, 1909LOCKING AND SIGNALING SYSTEM FOR TELEPHONE-REGISTERS.SPIEGEL ALEXANDER S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
940673November 23, 1909TELEPHONE-KEY AND MEANS FOR ACTUATING THE SAME.CHRISTENSEN WILLIAM -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
940658November 23, 1909SYSTEM FOR NULLIFYING INDUCTIVE DISTURBANCES.BARRETT JOHN A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
940655November 23, 1909ELECTRICAL CONDUCTING SYSTEM.ATHEARN WILLIAM E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
940654November 23, 1909ART OF NULLIFYING INDUCTIVE DISTURBANCES.ATHEARN WILLIAM E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
942807December 7, 1909TELEGRAPHIC REPEATING APPARATUS.ATHEARN WILLIAM E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
981015January 10, 1911PHANTOMED LOADED CIRCUIT.SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
980921January 10, 1911LOADED PHANTOM-CIRCUIT.CAMPBELL GEORGE A - ; SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
990219April 25, 1911SUPERVISORY SIGNALING SYSTEM.BLAUVELT WILLIAM G -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1002388September 5, 1911METHOD OF AND MEANS FOR CONNECTING TELEPHONE APPARATUS.GRAY ERNEST A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1020244March 12, 1912TOOL FOR BENDING RINGS.WRIGHT JOHN W -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1020541March 19, 1912INSTRUMENT FOR TESTING BATTERIES.DAVIDSON CHARLES J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1033019July 16, 1912INSULATOR.JEWETT FRANK B -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1032878July 16, 1912INSULATING-BUSHING.CAMATTE JOSEPH E -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1033963July 30, 1912VENTILATING SYSTEM.SURPRISE EDWIN M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1039988October 1, 1912CONTROLLING APPARATUS.MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1055863March 11, 1913TELEPHONE SIGNALING SYSTEM.BLAUVELT WILLIAM G -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1060308April 29, 1913INTERCOMMUNICATING TELEPHONE SYSTEM.BARROWS LEON D -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1061519May 13, 1913CONTROLLING APPARATUS.BLAUVELT WILLIAM G - ; MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1064433June 10, 1913METHOD OF REDUCING TELEPHONIC DISTURBANCES.BLACKWELL OTTO B - ; ANDEREGG GUSTAVUS A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1073748September 23, 1913SYSTEM FOR DIVIDING CALLS AMONG TELEPHONE-OPERATORS' POSITIONS.FAY HAROLD J W - ; MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1073589September 23, 1913TELEPHONE-EXCHANGE SYSTEM.BROWNE SIDNEY HAND -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1083259December 30, 1913CABLE TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1083258December 30, 1913ELECTRIC TRANSMISSION OF INTELLIGENCE.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1083257December 30, 1913TELEGRAPH SYSTEM.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1083256December 30, 1913TELEPHONY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1083255December 30, 1913ELECTRIC TRANSMISSION OF INTELLIGENCE.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1083456January 6, 1914TRANSLATING AND SELECTING SYSTEM.MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1088708March 3, 1914TELEGRAPH SYSTEM.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1089479March 10, 1914CABLE-TELEGRAPH SYSTEM.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1089426March 10, 1914TRANSLATING AND REGISTERING APPARATUS.MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1090217March 17, 1914TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1090990March 24, 1914ELECTRIC TRANSMISSION OF ENERGY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1091579March 31, 1914ELECTRIC TRANSMISSION OF INTELLIGENCE.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1092151April 7, 1914TELEGRAPHIC RECEIVING ORGANISM.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1093001April 14, 1914TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1092957April 14, 1914MEANS FOR REDUCING REFLECTION LOSSES IN PHANTOM CIRCUITS.SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1092956April 14, 1914MEANS FOR REDUCING REFLECTION LOSSES IN DUPLEX CIRCUITS.SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1093702April 21, 1914RELAY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1094578April 28, 1914DUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1095329May 5, 1914CABLE TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1096175May 12, 1914ELECTRIC TRANSMISSION OF INTELLIGENCE.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1097030May 19, 1914CABLE TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1099380June 9, 1914CABLE-TELEGRAPH SYSTEM.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1100018June 16, 1914CASE FOR LOADING COILS.JEWETT FRANK B - ; SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1102907July 7, 1914TELEPHONE CENTRAL SWITCHING SYSTEM.GRAY ERNEST A - ; MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1103421July 14, 1914CABLE TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1103130July 14, 1914CONNECTION FOR COIL-CASES AND CABLES.CUNNINGHAM JAMES - ; HORNER WILLIAM H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1103079July 14, 1914COIL-CASES FOR INSERTION IN CABLES.RHODES FREDERICK L -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1103073July 14, 1914EMERGENCY SIGNALING SYSTEM FOR TELEPHONE TOLL-COLLECTING APPARATUS.O'CONNELL JOSEPH J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1104956July 28, 1914TELEPHONE-OPERATOR'S EQUIPMENT.BLAUVELT WILLIAM G - ; MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1114174October 20, 1914CONTROLLING APPARATUS FOR TELEPHONE SWITCHING SYSTEMS.MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1114725October 27, 1914MEANS FOR DETERMINING TIME INTERVALS IN TELEPHONE SYSTEMS.BLAUVELT WILLIAM G -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1124904January 12, 1915ARTIFICIAL LINE.HOYT RAY S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1125954January 26, 1915TELEPHONE-EXCHANGE SYSTEM.BROWNE SIDNEY HAND -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1126956February 2, 1915METHOD OF AND MEANS FOR EQUALIZING THE POTENTIALS OF GROUNDING-POINTS.CLARK ALVA B -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1133750March 30, 1915TRANSFORMER.SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1144560June 29, 1915INDICATING SYSTEM.MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1167694January 11, 1916ARTIFICIAL LINE.HOYT RAY S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1167693January 11, 1916ARTIFICIAL LINE.HOYT RAY S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1167677January 11, 1916SYSTEM FOR MEASURING CAPACITIES.CAMPBELL GEORGE A - ; BLACKWELL OTTO B - ; COLPITTS EDWIN H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1172760February 22, 1916SYSTEM OF CALL DISTRIBUTION.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1173655February 29, 1916PHANTOM CIRCUIT.FAY FRANK H - ; SHAW THOMAS - ; PILLIOD JAMES J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1174187March 7, 1916LOADING-COIL.SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1175112March 14, 1916TELEPHONE SYSTEM.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1175111March 14, 1916MEANS FOR PREVENTING INDUCTIVE DISTURBANCE IN THE TEST-CIRCUITS OF TELEPHONE-SWITCHBOARDS.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1186577June 13, 1916ATTACHMENT FOR COIN-COLLECTING APPARATUS.HOEFER ALFRED U - ; BARROWS LEON D -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1188531June 27, 1916DUPLEX WIRELESS SYSTEM.CARSON JOHN R -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1198345September 12, 1916TELEPHONE-TRANSMITTER.GRISSINGER ELWOOD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1198214September 12, 1916TELEPHONE SYSTEM.GRISSINGER ELWOOD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1198213September 12, 1916TELEPHONE-REPEATER.GRISSINGER ELWOOD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1198212September 12, 1916TELEPHONE-REPEATER.GRISSINGER ELWOOD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1200822October 10, 1916GOVERNING DEVICE FOR ESCAPEMENT MECHANISM.ERICKSON JOHN -AMERICAN TELEPHONE FIRE ALARM COMPANY, United States of America (US)
1203326October 31, 1916TELEPHONE RELAY OR REPEATER.GRISSINGER ELWOOD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1203325October 31, 1916TELEPHONE RELAY OR REPEATER.GRISSINGER ELWOOD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1205618November 21, 1916SPEECH-TRANSMITTING MECHANISM.GRISSINGER ELWOOD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1207447December 5, 1916CABLE-LUBRICATING WHEEL.DEUSEN WALLACE M VAN - ; PERSSON FRANS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1206906December 5, 1916FOLDING SCALING-LADDER,ERANS PERSSON, OF NEW YORKAMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OP NEW YORK.
1207836December 12, 1916CONNECTING SYSTEM FOR TELEPHONE-STATIONS.BARROWS LEON D -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1210314December 26, 1916TELEPHONE TOLL SYSTEM.HOEFER ALFRED U - ; BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1211274January 2, 1917PARTY-LINE SIGNALING SYSTEM.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1211044January 2, 1917SIGNALING SYSTEM.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1215406February 13, 1917CUTTING-TOOL.PERSSON FRANS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1215331February 13, 1917TELEPHONE TOLL SYSTEM.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1218413March 6, 1917QUADRUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1218274March 6, 1917QUADRUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1219110March 13, 1917METHOD OF AND MEANS FOR QUADRUPLEXING CABLES.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1218870March 13, 1917DUPLEXING TELEGRAPHIC LINES.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1219955March 20, 1917QUADRUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1219760March 20, 1917METHOD OF AND MEANS FOR CORRECTING LOADING-SECTION IRREGULARITIES IN TRANSMISSION-LINES.MILLS JOHN - ; HOYT RAY S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1219727March 20, 1917TELEPHONE REPEATING SYSTEM.GRISSINGER ELWOOD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1219561March 20, 1917QUADRUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1220756March 27, 1917QUADRUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1220238March 27, 1917QUADRUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1221547April 3, 1917TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1221188April 3, 1917QUADRUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1222303April 10, 1917QUADRUPLEX TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1222077April 10, 1917FRAUD-DETECTING TELEPHONE TOLL SYSTEM.COUSINS VOLNEY D -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1221870April 10, 1917TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1222810April 17, 1917PROTECTIVE SYSTEM FOR COMPOSITE CIRCUITS.SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1222771April 17, 1917TELEGRAPHIC RECEIVING ORGANISMS.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1223376April 24, 1917WIRELESS RECEIVING SYSTEM.ESPENSCHIED LLOYD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1224970May 8, 1917LINEMAN'S SHIELD.SINGER FRANK K -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1227114May 22, 1917ELECTRICAL RECEIVING, TRANSLATING, OR REPEATING CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1227113May 22, 1917ELECTRIC WAVE-FILTER.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1228167May 29, 1917AUXILIARY-SUPERVISORY-SIGNAL SYSTEM.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1227735May 29, 1917SYSTEM FOR CONNECTING TELEPHONE-STATIONS.BARROWS LEON D - ; CHARLESWORTH HARRY P -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1228468June 5, 1917METHOD OF LOCATING SPECIAL TRANSPOSITION-POINTS.MOURADIAN HUGHES -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1232183July 3, 1917CONTROLLING SYSTEM.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1233769July 17, 1917DUPLEX CIRCUIT.ESPENSCHIED LLOYD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1233768July 17, 1917INDUCTANCE DEVICE.ESPENSCHIED LLOYD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1233767July 17, 1917DUPLEX CIRCUIT.ESPENSCHIED LLOYD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1233766July 17, 1917DUPLEX CIRCUIT.ESPENSCHIED LLOYD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1236576August 14, 1917TELEGRAPHIC TRANSMISSION.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1236575August 14, 1917TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1238009August 21, 1917TELEGRAPH-REPEATER.FELL JOHN M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1238008August 21, 1917TELEGRAPH SYSTEM.FELL JOHN M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1240213September 18, 1917ARTIFICIAL LINE.HOYT RAY S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1243066October 16, 1917NETWORK FOR NEUTRALIZING THE CHARACTERISTIC REACTANCE OF A LOADED LINE.HOYT RAY S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1243705October 23, 1917METHOD OF AND MEANS FOR TRANSMITTING SIGNALS.CARSON JOHN R -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1244697October 30, 1917WIRELESS RECEIVING SYSTEM.CARSON JOHN R -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1245894November 6, 1917TELEGRAPHIC RECEIVING SYSTEM.FELL JOHN M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1245490November 6, 1917TELEPHONE-SERVICE-OBSERVING SYSTEM.MOLINA EDWARD C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1245402November 6, 1917SYSTEM FOR OBSERVING TELEPHONE SERVICE.TOOMEY JOHN F -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1245341November 6, 1917SERVICE-OBSERVING SYSTEM.HOFFMANN HENRY L -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1245321November 6, 1917TESTING-CIRCUIT FOR MEASURED-SERVICE APPARATUS.DAVIDSON JOHN JR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1247120November 20, 1917TELEGRAPHY.KITSEE ISIDOR -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1251364December 25, 1917SIGNALING SYSTEM FOR MULTIPLEX TELEPHONE-CIRCUITS.GHERARDI BANCROFT -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1251363December 25, 1917SIGNALING SYSTEM.GHERARDI BANCROFT -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1251700January 1, 1918SHIELD FOR MAGNETIC COILS.SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1251651January 1, 1918CORE FOR MAGNETIC COILS.ESPENSCHIED LLOYD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254476January 22, 1918SIGNALING-CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254475January 22, 1918SIGNALING-CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254474January 22, 1918SIGNALING-CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254473January 22, 1918SIGNALING-CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254472January 22, 1918CAMPBELL, OF MOEFTCLAIR, HEW JERSEY, ASSXGKTO TO AHEBICAH TELEPHONE AND TELEGBAPH COMPANY, A COBPOKATIOH OF HEW YOBK.GEOBGE A.AMERICAN TELEPHONE AND TELEGRAPH COMPANY, United States of America (US)
1254471January 22, 1918SIGNALING-CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254146January 22, 1918SIGNALING-CIRCUIT.MARTIN WILLIAM H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254118January 22, 1918SIGNALING-CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254117January 22, 1918SIGNALING-CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1254116January 22, 1918SIGNALING-CIRCUIT.CAMPBELL GEORGE A -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1256889February 19, 1918WIRELESS DUPLEX SIGNALING SYSTEM.ESPENSCHIED LLOYD -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1261096April 2, 1918TESTING APPARATUS.BLACKWELL OTTO B -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1262912April 16, 1918MEANS FOR PREVENTING DISTURBANCES IN SUBSTATION TELEPHONE SETS.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1265851May 14, 1918MECHANISM FOR INSTALLING TRANSMISSION LINE-WIRES.WILLIAMS HARRY C -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1270465June 25, 1918AUTOMATIC SWITCHING MEANS.TOOMEY JOHN F -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1273154July 23, 1918RELAY SELECTING-CIRCUIT FOR ARTIFICIAL LINES.DEMAREST CHARLES S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1277274August 27, 1918ARTIFICIAL-LINE-SELECTING SYSTEM.TOOMEY JOHN F - ; READ WALTER V H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1279882September 24, 1918SIGNALING SYSTEM.KUHN GEORGE W -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1281084October 8, 1918DEMAGNETIZING APPARATUS.SHAW THOMAS - ; KOUKOL CLEMENT J -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1280969October 8, 1918THROUGH-RINGING AMPLIFIER.DEMAREST CHARLES S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1283687November 5, 1918SIGNALING SYSTEM.DARROW LEO H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1287831December 17, 1918SYSTEM FOR COMPENSATING FOR DIFFERENCES OF POTENTIALS.BASCOM HENRY M -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1288709December 24, 1918DUPLEX BALANCING-CIRCUITS.SHAW THOMAS -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1290808January 7, 1919COMPOSITE RINGING APPARATUS.TOOMEY JOHN F -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1295816February 25, 1919TESTING APPARATUS FOR FOUR-WIRE REPEATER-CIRCUITS.TOOMEY JOHN F -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1301827April 29, 1919TEST-CONNECTOR.FLYE WILLIAM L -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1308726July 1, 1919MEANS FOR CONTROLLING ARTIFICIAL LINES.JOHN F. TOOMEY, OF NEW YOKK, AND CHABLES S. DEMAEEST, OP FLATBTJSH, NEW<BR>YORK,AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1308725July 1, 1919SELjECTING-CISCITIT FOR ARTIFICIAL LINES.JOHN F. TOOMEYYOF NEW YORK. AND CHARLES S. DSMABEST, OF FLATBTTSH, NEW<BR>YORK,AMERICAN TELEPHONE AND TELEGRAPH COMPANY. A CORPORATION OF NEW YORK.
1309538July 8, 1919WIRELESS SYSTEM.JOHN MILLS, OF WYOMING, NEW JERSEY, AND JOHN R. CARSON, OF NEW YORK, N. Y.,<BR>AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORA- TION OF NEW YORK
1309459July 8, 1919WIRELESS SIGNALING SYSTEM.JOHN B. CABSON, OF N. Y.AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1309400July 8, 1919INTERFERENCE-BALANCE.LLOYD ESPENSCHIED, OF NEW YORKAMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1310730July 22, 1919SEMIMECHANICAL TELEPHONE SYSTEM.WILLIAM: G. BLAIJVELT, OF N. Y.AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1312433August 5, 1919TRANSLATING-CIRCTTITS.JOHN B. CARSON, OF N. Y.AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1312574August 12, 1919SECRET-SIGNALING SYSTEM.RALPH E. PIERCE, OF NEW YORKAMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1313413August 19, 1919COMPOSITE RINGING APPARATUS.HAROLD S. OSBOBNE, OF N. Y.AMERICAN TELEPHONE AND TELEGRAPH COMPANY. A CORPORATION OF NEW YORK.
1314827September 2, 1919COMPOSITE SIGNALING-CIRCUITS.HAROLD S. OSBORNE, OF N. Y.AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1315539September 9, 1919DISTORTION-CORRECTING CIRCUIT.JOHN R. CARSON, OF N. Y.AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1318088October 7, 1919COMBINATION-TOOL.KLEIN CHARLES H -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1318937October 14, 1919TRANSMISSION-CONTROLLING MEANS FOR FOTTRrWIRE REPEATERS.JOHN F. TOOMEY, OF NEW YOE-K, AND CHARLES S, DEMAREST, OF BROOKLYN, NEW<BR>YORK,AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1320489November 4, 1919METHOD OF CONSTRUCTING TELEPHONE-CIRCUITS.HAROLD S. OSBOBHE, OF N. Y.AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OF NEW YORK.
1321723November 11, 1919THROUGH RINGING REPEATER CIRCUITS.DEMAREST CHARLES S -AMERICAN TELEPHONE & TELEGRAPH, United States of America (US)
1326719December 30, 1919SYSTEM OF GENERATING ELECTRICAL CURRENTS.OTTO A. FRETJND, OP N. Y.AMERICAN TELEPHONE AND TELEGRAPH COMPANY, A CORPORATION OE NEW YORK.
1329949February 3, 1920Electrical measuring apparatusBLACKWELL OTTO B. ; SHAW THOMAS ; KOUKOL CLEMENT J.AMERICAN TELEPHONE
TELEGRAPH COMPANY
1333111March 9, 1920Impedance-equalizer for use with transformersHOYT RAY S.AMERICAN TELEPHONE
TELEGRAPH COMPANY
1332927March 9, 1920Reeling deviceSMITH TEMPLE C.AMERICAN TELEPHONE
TELEGRAPH COMPANY
1334674March 23, 1920Ratchet-screwdriverJR. ALPHONSE PANNITTI,AMERICAN TELEPHONE
TELEGRAPH COMPANY
1336558April 13, 1920Anti-abrasion cable-supportGHERARDI BANCROFTAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1340260May 18, 1920Registering-circuits for coin-boxesTHOMPSON GEORGE K.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1340989May 25, 1920Aerial-cable guideSMITH TEMPLE CLIFFORDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1343308June 15, 1920Duplex translating-circuitsCARSON JOHN R.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1347049July 20, 1920Correcting circuits for high-distortion linesMARTIN WILLIAM H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1348909August 10, 1920Telephone toll-circuitsTOOMEY JOHN F.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1351863September 7, 1920Telephone-repeaterJOHN MILLSAMERICAN TELEPHONE & TELEGRAPH
1351845September 7, 1920Anchoring deviceFISH LEWIN BENJAMINAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1353031September 14, 1920Vacuum-bulb for signaling apparatusDEMAREST CHARLES S.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1352828September 14, 1920Four-wire circuitMILLS JOHNAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1352786September 14, 1920Four-wire transmission systemCAMPBELL GEORGE A.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1352549September 14, 1920Cable-hangerJR. CHARLES G. SINCLAIR,AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1353735September 21, 1920Antenna structureESPENSCHIED LLOYDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1353698September 21, 1920Combined carrier and radio systemAFFEL HERMAN A.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1353637September 21, 1920Repeater-circuitCRISSON GEORGEAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1354229September 28, 1920Telephone-transmitterTHOMPSON GEORGE K.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1355147October 12, 1920Network-selecting deviceJACOBS OLIVER B.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1355897October 19, 1920Testing-circuit for repeaters equipped with automatic networkselectorsDEMAREST CHARLES SAMERICAN TELEPHONE & TELEGRAPH
1356557October 26, 1920Roller-clutchPOTTS LOUIS M.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1356546October 26, 1920Ciphering systemMOREHOUSE LYMAN FAMERICAN TELEPHONE & TELEGRAPH
1357296November 2, 1920Substation-circuitsMARTIN WILLIAM H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1357264November 2, 1920Magnetic modulatorDYKE KARL S. VANAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1358053November 9, 1920Telephone system for auditoriumsBASCOM HENRY MAMERICAN TELEPHONE & TELEGRAPH
1357979November 9, 1920Transmission-equalization arrangementHARPER ALFRED U.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1358777November 16, 1920Signaling-circuits for electric railwaysOSBORNE HAROLD S.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1358758November 16, 1920Telephone trunk-circuitsKUHN GEORGE W.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1359516November 23, 1920Holding-circuits for toll-switching trunksLOYNES OWEN H.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1360332November 30, 1920Testing-circuitTOOMEY JOHN F.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1360331November 30, 1920Testing and adjusting apparatus for cord-circuitsTOOMEY JOHN F.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1361522December 7, 1920Plural modulation systemESPENSCHIED LLOYDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1361488December 7, 1920Plural modulation systemOSBORNE HAROLD S.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1361487December 7, 1920Plural demodulation-circuitsOSBORNE HAROLD S.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1361486December 7, 1920Composite signaling systemOSBORNE HAROLD S. ; PARKER RALZEMOND D.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1361026December 7, 1920Testing apparatusDEMAREST CHARLES S. ; SHOFFSTALL HUGH F.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1361929December 14, 1920Monitoring-circuit for telephone-repeatersTOOMEY JOHN F.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1361928December 14, 1920Testing and adjusting apparatus for cord-circuitsTOOMEY JOHN F.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1362612December 21, 1920Wireless receiving systemESPENSCHIED LLOYDAMERICAN TELEPHONE AND TELEGRAPH COMPANY
1362596December 21, 1920Semimechanical telephone systemBLAUVELT WILLIAM G.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1363220December 28, 1920Signaling deviceBASCOM HENRY M.AMERICAN TELEPHONE AND TELEGRAPH COMPANY
1363219December 28, 1920Trunking systemBASCOM HENRY M.AMERICAN TELEPHONE AND TELEGRAPH COMPANY