Patent	Date	Title	Inventor	Assignee
2231602	February 11, 1941	Multiplex high frequency signaling	SOUTHWORTH GEORGE C	AMERICAN TELEPHONE & TELEGRAPH
2231906	February 18, 1941	Calculating span clearance rule	HAROLD HANSEN CARL	AMERICAN TELEPHONE & TELEGRAPH
2232912	February 25, 1941	Three-element carrier code arrangement	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2232891	February 25, 1941	Condenser telephone transmitter circuit	STONE STONE JOHN	AMERICAN TELEPHONE & TELEGRAPH
2237498	April 8, 1941	Telegraph system	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2237492	April 8, 1941	Electrical network	LANDENBERGER CHARLES F ; TALLEY THOMAS J	AMERICAN TELEPHONE & TELEGRAPH
2237474	April 8, 1941	Device for repairing cable terminal binding posts	CHANNELL JAMES W	AMERICAN TELEPHONE & TELEGRAPH
2237473	April 8, 1941	Teletypewriter switching system	JAMES BRITT HORACE	AMERICAN TELEPHONE & TELEGRAPH
2240974	May 6, 1941	Holder for paper sheets	COFFEY ARMSTRONG FRANK ; METER KARL KITTSON VAN	AMERICAN TELEPHONE & TELEGRAPH
2244609	June 3, 1941	Calling device	COSGROVE FRANK A	AMERICAN TELEPHONE & TELEGRAPH
2244597	June 3, 1941	Telegraph system	JACOB ANSPACH RUSSELL	AMERICAN TELEPHONE & TELEGRAPH
2244596	June 3, 1941	Automatic telephone system	ADOLPH ANDERSON GUSTAVE	AMERICAN TELEPHONE & TELEGRAPH
2244566	June 3, 1941	Telegraph test board	TRAPP NEISWINTER JAMES	AMERICAN TELEPHONE & TELEGRAPH
2244074	June 3, 1941	Reversible line feed for teletypewriters	MARTIN WADE B ; FRANKLIN TOWNSEND GEORGE	AMERICAN TELEPHONE & TELEGRAPH
2244058	June 3, 1941	Interrupter circuit	OSMUND CROFFORD DANIEL	AMERICAN TELEPHONE & TELEGRAPH
2244041	June 3, 1941	Transmission measuring system	FRANK ANDREWS JOSEPH	AMERICAN TELEPHONE & TELEGRAPH
2245859	June 17, 1941	Device for cleaning electrical and associated equipment	RAYMOND HUNTER FREDERICK	AMERICAN TELEPHONE & TELEGRAPH
2248096	July 8, 1941	Testing circuit	GIFFORD LANE LELAND	AMERICAN TELEPHONE & TELEGRAPH
2249166	July 15, 1941	Electrical probe	PARKER GEORGE B ; PARKER LLOYD L ; MEEHAN JOHN P	AMERICAN TELEPHONE & TELEGRAPH
2249164	July 15, 1941	Electrical measuring system	KERMIT OLSON NELS	AMERICAN TELEPHONE & TELEGRAPH
2249153	July 15, 1941	Testing device	MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2249103	July 15, 1941	Open telegraph alarm circuit	JACOB ANSPACH RUSSELL	AMERICAN TELEPHONE & TELEGRAPH
2249099	July 15, 1941	Direct current power system	HENRY WALTON OTTO	AMERICAN TELEPHONE & TELEGRAPH
2248923	July 15, 1941	Communication system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2252645	August 12, 1941	Apparatus for producing constant current	FERGUSON ROUGVIE JAMES	AMERICAN TELEPHONE & TELEGRAPH
2252629	August 12, 1941	Supervisory signal system	HAROLD HANLEY FRANK ; CARTER FRANK J ; HOWARD DAVIDSMEYER ORVILLE ; LAMBERSON OTHA M	AMERICAN TELEPHONE & TELEGRAPH BELL TELEPHONE LABOR INC
2252622	August 12, 1941	Start-stop regenerative telegraph repeater	FOX FRANCIS H	AMERICAN TELEPHONE & TELEGRAPH
2257685	September 30, 1941	Oscillation generator	WILLIAM HIDY JOHN	AMERICAN TELEPHONE & TELEGRAPH
2257683	September 30, 1941	Ticket stacking device	SPANOGLE HAYWOOD KENNETH	AMERICAN TELEPHONE & TELEGRAPH
2257677	September 30, 1941	Printing telegraph system	CLAYTON GOODWIN	AMERICAN TELEPHONE & TELEGRAPH
2257663	September 30, 1941	Apparatus for producing interrupted alternating current	WILLIUS ALBRECHT HAROLD	AMERICAN TELEPHONE & TELEGRAPH
2257592	September 30, 1941	Directional monitoring system	LEO BUXTON BENTLEY	AMERICAN TELEPHONE & TELEGRAPH
2257553	September 30, 1941	Ribbon reverse mechanism	ANTHONY HEPT JOHN	AMERICAN TELEPHONE & TELEGRAPH
2262567	November 11, 1941	Teletypewriter indicating system	VOTAW CLARENCE J	AMERICAN TELEPHONE & TELEGRAPH
2262543	November 11, 1941	Communication system	ANDERS BORGESON CARL	AMERICAN TELEPHONE & TELEGRAPH
2262541	November 11, 1941	Teletypewriter selective calling and switching system	JACOB ANSPACH RUSSELL	AMERICAN TELEPHONE & TELEGRAPH
2265120	December 2, 1941	Secret signaling system	BURKE PERRY DONALD	AMERICAN TELEPHONE & TELEGRAPH
2265067	December 2, 1941	Transmission system	ELLESTAD IRWIN M	AMERICAN TELEPHONE & TELEGRAPH
2265056	December 2, 1941	Radio telephone system	FRANKLIN BOWERS ALBERT	AMERICAN TELEPHONE & TELEGRAPH
2265044	December 2, 1941	Secrecy system	OSBORNE HAROLD S	AMERICAN TELEPHONE & TELEGRAPH
2265145	December 9, 1941	Frequency modulator	LEONARD CLARKE JOHN	AMERICAN TELEPHONE & TELEGRAPH
2269379	January 6, 1942	Teletypewriter switching system	MCDONALD PATTON OSCAR	AMERICAN TELEPHONE & TELEGRAPH
2269375	January 6, 1942	Telephone system	MCCOWN RAY B ; HOWARD SCHNECKLOTH HARRY ; WILLIAM SMITH ROBERT	AMERICAN TELEPHONE & TELEGRAPH BELL TELEPHONE LABOR INC
2269361	January 6, 1942	Code calling system	STEVENS DEWIRE DONALD	AMERICAN TELEPHONE & TELEGRAPH
2269346	January 6, 1942	Teletypewriter switchboard service observing circuit	FREDERICK PAGE HAROLD ; LOUIS RICHARD ROBERT	AMERICAN TELEPHONE & TELEGRAPH
2269335	January 6, 1942	Telephone system	JOSEPH CURLEY KIERAN	AMERICAN TELEPHONE & TELEGRAPH
2278703	April 7, 1942	Teletypewriter recording system	LEONARD KNITTLE GALE	AMERICAN TELEPHONE & TELEGRAPH
2278702	April 7, 1942	Telephone circuit	LEONARD KNITTLE GALE	AMERICAN TELEPHONE & TELEGRAPH
2278690	April 7, 1942	Frequency control system	CLARKE JOHN L	AMERICAN TELEPHONE & TELEGRAPH
2278633	April 7, 1942	Temperature control apparatus	BERNARD BAGNALL VERNON	AMERICAN TELEPHONE & TELEGRAPH
2284612	May 26, 1942	Phase control in electrical transmission	IBBOTSON GREEN ESTILL ; NEWTON MONK	AMERICAN TELEPHONE & TELEGRAPH
2284329	May 26, 1942	Telephone system	ARNOLD LESTI	AMERICAN TELEPHONE & TELEGRAPH
2284324	May 26, 1942	Typing mechanism	WILLIAM KLABUNDE HENRY	AMERICAN TELEPHONE & TELEGRAPH
2284302	May 26, 1942	Support for wires	WILLIAM ROBERTS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2284296	May 26, 1942	Telegraph circuit	JULIUS MUENCH EUGENE ; LEE GREENE MONTE	AMERICAN TELEPHONE & TELEGRAPH
2284247	May 26, 1942	Radio signaling system	BERNARD BAGNALL VERNON	AMERICAN TELEPHONE & TELEGRAPH
2293629	August 18, 1942	Telegraph system	ROWE WILLIAM LUCK	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2293611	August 18, 1942	Telephone system	MEEDS LLOYD T.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2293588	August 18, 1942	Telephone system	CAIN GEORGE LELAND ; SOUCY HAROLD ARTHUR	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2300050	October 27, 1942	Teletypewriter control system	LEONARD JAMES MORTIMER ; BORGESON CARL ANDERS	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2300045	October 27, 1942	Teletypewriter system	GAMMELL ERNEST OSMOND	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2300044	October 27, 1942	Telephone subscriber's station	DEWIRE DONALD STEVENS	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2300035	October 27, 1942	Means for suspending aerial cables	NEALE DORY JACOB	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2300007	October 27, 1942	Telegraph system	RICHARDS KENNETH WATSON	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2300003	October 27, 1942	Selective signaling system	NEISWINTER JAMES T.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2299987	October 27, 1942	Portable apparatus for cleaning electrical equipment	HUNTER FREDERICK RAYMOND	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2299969	October 27, 1942	Signaling arrangement for telegraph systems	EGNER ROBERT JAMES ; WALKER CHARLES ROBERT	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2301878	November 10, 1942	Lamp mounting bracket	IWEMA BERNARD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2301853	November 10, 1942	Cleaning tool	CANNON FRANK JESS	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2301844	November 10, 1942	Telegraph alarm system	ANDERSON CLYDE CHRISTEN	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2301837	November 10, 1942	Testing arrangement for trunks to community dial offices	WILEY MASON BAIN ; FORESTER ANTHONY	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2301831	November 10, 1942	Apparatus to indicate teletypewriter skipping	FRANKLIN TOWNSEND GEORGE	AMERICAN TELEPHONE & TELEGRAPH
2301828	November 10, 1942	Frequency sensitive elements	STONE JOHN STONE	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2301824	November 10, 1942	Guard for coin gauges	SIMSON ROBIE SEYMOUR	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2301211	November 10, 1942	Teletypewriter system	HANLEY FRANK HAROLD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2306231	December 22, 1942	Coupling apparatus for vehicles	CLIFFORD SMITH TEMPLE ; EDWARD FREEMAN ALBERT	AMERICAN TELEPHONE & TELEGRAPH
2306220	December 22, 1942	Calling key testing apparatus	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2306214	December 22, 1942	Telegraph system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2306203	December 22, 1942	Holding circuit for subscribers' stations	CHRISTEN ANDERSON CLYDE	AMERICAN TELEPHONE & TELEGRAPH
2307901	January 12, 1943	Gain control system	JOHN THORPE	AMERICAN TELEPHONE & TELEGRAPH
2307900	January 12, 1943	Sag equalizing device	JOSEPH PILLIOD JAMES ; BURDSALL GRIFFEN ELLWOOD	AMERICAN TELEPHONE & TELEGRAPH
2307896	January 12, 1943	System for indicating circuit faults in transmission systems	NEISWINTER JAMES T ; ROY FEATHERINGHAM LEE	AMERICAN TELEPHONE & TELEGRAPH
2307884	January 12, 1943	Tool for applying cushions to plugs and cords	ALFRED GREENWOOD HERBERT	AMERICAN TELEPHONE & TELEGRAPH
2307842	January 12, 1943	Teletypewriter system	MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2312314	March 2, 1943	Ribbon shifting mechanism	EMMANUEL BORDONARO LUCIAN	AMERICAN TELEPHONE & TELEGRAPH
2315439	March 30, 1943	Teletypewriter system	MAXWELL JOHN L ; RICHARD SHIMMIN ELMER	AMERICAN TELEPHONE & TELEGRAPH
2315419	March 30, 1943	Telegraph breaking system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2315413	March 30, 1943	Teletypewriter selection system	OSMOND GAMMELL ERNEST	AMERICAN TELEPHONE & TELEGRAPH
2315383	March 30, 1943	Method and apparatus for locating transmission faults	FRANK ANDREWS JOSEPH	AMERICAN TELEPHONE & TELEGRAPH
2321418	June 8, 1943	Teletypewriter numbering system	BURKE PERRY DONALD	AMERICAN TELEPHONE & TELEGRAPH
2321415	June 8, 1943	Conduit system	FRANK PELTZ HOWARD ; HERMAN ZIESCHANG GUSTAV	AMERICAN TELEPHONE & TELEGRAPH
2321412	June 8, 1943	Dial controlled signaling system	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2321392	June 8, 1943	Telegraph station break-in system	WILLIAM KAUFMAN ARTHUR	AMERICAN TELEPHONE & TELEGRAPH
2321382	June 8, 1943	Teletypewriter switching system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2321372	June 8, 1943	Telegraphic auction system	DUNCAN JAMES ARCHIBALD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2321349	June 8, 1943	Telegraph system	JACOB ANSPACH RUSSELL	AMERICAN TELEPHONE & TELEGRAPH
2327474	August 24, 1943	Selective telegraph system	ROBERT WALKER CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2327458	August 24, 1943	Testing system	NICHOLSON RELFE JOHN	AMERICAN TELEPHONE & TELEGRAPH
2334592	November 16, 1943	Teletypewriter transmitting system	ROBERT WALKER CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2334575	November 16, 1943	Selective signaling system	NEISWINTER JAMES T.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2334574	November 16, 1943	Selective signaling system	NEISWINTER JAMES T.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2334551	November 16, 1943	Telegraph system	HANLEY FRANK HAROLD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2334534	November 16, 1943	Teletypewriter	BALLWEG KENNETH E.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2336373	December 7, 1943	Teletypewriter switching system	STARR HARRY R. ; WADDINGTON WALTER E.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2337929	December 28, 1943	Apparatus for reducing bias in telegraph signals	WATSON RICHARDS KENNETH	AMERICAN TELEPHONE & TELEGRAPH
2337886	December 28, 1943	Telegraph system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2337875	December 28, 1943	Telephone system	STEVENS DEWIRE DONALD	AMERICAN TELEPHONE & TELEGRAPH
2346115	April 4, 1944	Emergency telephone system	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2346114	April 4, 1944	Right-of-way telephone system	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2346113	April 4, 1944	Auxiliary telephone apparatus	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2345987	April 4, 1944	Dial controlled signaling system	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2345959	April 4, 1944	Telephone system	BLESSING LEONARD M	AMERICAN TELEPHONE & TELEGRAPH
2345933	April 4, 1944	Phase control in electrical transmission	GREEN ESTILL IBBOTSON ; MONK NEWTON	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2345929	April 4, 1944	Conductor laying machine	FREEMAN ALBERT EDWARD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2347518	April 25, 1944	Testing arrangement for telegraph circuits	SPENCER SODERHOLM JAMES ; CHARLES BREEN	AMERICAN TELEPHONE & TELEGRAPH
2347507	April 25, 1944	Alarm circuit	ALBERT ROUNDBURG ERIC	AMERICAN TELEPHONE & TELEGRAPH
2347505	April 25, 1944	Phantom magneto telephone system	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2347497	April 25, 1944	Damping means for current responsive apparatus	NEISWINTER JAMES T ; HORSEY OLIVER P	AMERICAN TELEPHONE & TELEGRAPH
2350193	May 30, 1944	Auxiliary telephone apparatus	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2350186	May 30, 1944	Teletypewriter system	BURKE PERRY DONALD	AMERICAN TELEPHONE & TELEGRAPH
2350180	May 30, 1944	Telegraph system	GORDON MILLER ARTHUR	AMERICAN TELEPHONE & TELEGRAPH
2350177	May 30, 1944	Telephone measuring system	IRVING MACKEN HAROLD	AMERICAN TELEPHONE & TELEGRAPH
2350146	May 30, 1944	Telegraphic auction system	ANDERS BORGESON CARL	AMERICAN TELEPHONE & TELEGRAPH
2353785	July 18, 1944	Telephone substation	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2353673	July 18, 1944	Code signaling system	JOSEPH KENNEDY WILLIAM	AMERICAN TELEPHONE & TELEGRAPH
2357576	September 5, 1944	Pay station telephone system	BROOKS CHESTER E ; FLINT ERLON W	AMERICAN TELEPHONE & TELEGRAPH BELL TELEPHONE LABOR INC
2357840	September 12, 1944	Regenerative telegraph repeater	MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2358610	September 19, 1944	Telegraph signaling system	WEBER JR EDWARD HENRY	AMERICAN TELEPHONE & TELEGRAPH
2358594	September 19, 1944	Telephone broadcast system	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2358593	September 19, 1944	Teletypewriter recording system	JONES RANK PAUL	AMERICAN TELEPHONE & TELEGRAPH
2358586	September 19, 1944	Telephone call transmitter	EARNEST NEWELL CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2358577	September 19, 1944	Device for lifting weights	JACOBSEN MORRIS H L	AMERICAN TELEPHONE & TELEGRAPH
2358554	September 19, 1944	Lock mechanism	BIXEL EDWARD C	AMERICAN TELEPHONE & TELEGRAPH
2360749	October 17, 1944	Telephone system	WIEGAND FRANK H	AMERICAN TELEPHONE & TELEGRAPH
2360721	October 17, 1944	Signaling device	ROSE ALLEN M	AMERICAN TELEPHONE & TELEGRAPH
2360702	October 17, 1944	Teletypewriter system	MARTIN WADE B ; HENRY WEINMANN ROBERT	AMERICAN TELEPHONE & TELEGRAPH
2360643	October 17, 1944	Tow hook mounting for vehicles	CARL BIXEL EDWARD	AMERICAN TELEPHONE & TELEGRAPH
2360637	October 17, 1944	Reperforator tape feed-out arrangement	JACOB ANSPACH RUSSELL ; MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2361258	October 24, 1944	Reeling device	HENRY BROMM FRED	AMERICAN TELEPHONE & TELEGRAPH
2367062	January 9, 1945	Telephone system	HENRY SCHROEPPEL HAROLD	AMERICAN TELEPHONE & TELEGRAPH
2367054	January 9, 1945	Signaling system	RHOADS CHARLES S	AMERICAN TELEPHONE & TELEGRAPH
2367042	January 9, 1945	Signaling apparatus	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2367013	January 9, 1945	Insulation test set	MASON EDMONDS ROBERT	AMERICAN TELEPHONE & TELEGRAPH
2366998	January 9, 1945	Accounting and statistical system	ROBERT BRUCE	AMERICAN TELEPHONE & TELEGRAPH
2366733	January 9, 1945	Communication system	KRECEK JOSEPH A ; WALKER CHARLES R	BELL TELEPHONE LABOR INC AMERICAN TELEPHONE & TELEGRAPH
2368264	January 30, 1945	Battery charging system	FRANKLYN SCOTT WALTER ; STEWART PETERS JAMES	AMERICAN TELEPHONE & TELEGRAPH
2369808	February 20, 1945	Short-wave radio transmission	CLARK SOUTHWORTH GEORGE	AMERICAN TELEPHONE & TELEGRAPH
2373675	April 17, 1945	Party line printing telegraph system	GARDNER LELAND A ; RICHARDS KENNETH W	BELL TELEPHONE LABOR INC AMERICAN TELEPHONE & TELEGRAPH
2375136	May 1, 1945	Telephone system	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2375125	May 1, 1945	Teletypewriter synchronizing arrangement	MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2375100	May 1, 1945	Electromagnetic relay	ORLANDO GIBBON CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2375073	May 1, 1945	Plow point	BROWN HOWARD D ; EDWARD FREEMAN ALBERT	AMERICAN TELEPHONE & TELEGRAPH
2375066	May 1, 1945	Automatic coin return system	AVERY ROBERT C	AMERICAN TELEPHONE & TELEGRAPH
2375064	May 1, 1945	Teletypewriter control system	JACOB ANSPACH RUSSELL ; ROBERT WALKER CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2375048	May 1, 1945	Selective signaling system	FRANCIS TORPIE JOHN	AMERICAN TELEPHONE AND TELEPHO
2376275	May 15, 1945	Signaling system	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2376272	May 15, 1945	Automatic telephone answering system	PETERSON EDWIN L ; PAPENMEYER GEORGE W	AMERICAN TELEPHONE & TELEGRAPH
2376248	May 15, 1945	Telegraph system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2376232	May 15, 1945	Testing device	HENRY CUMMINGS WILLIAM	AMERICAN TELEPHONE & TELEGRAPH
2376225	May 15, 1945	Telegraph transmission measuring system	BEYLAND SIDNEY W	AMERICAN TELEPHONE & TELEGRAPH
2377453	June 5, 1945	Telephone system	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2377438	June 5, 1945	Testing apparatus	MAXWELL JOHN L	AMERICAN TELEPHONE & TELEGRAPH
2377394	June 5, 1945	Cable splicing apparatus	OWEN ADKERSON BRANCH	AMERICAN TELEPHONE & TELEGRAPH
2379089	June 26, 1945	Base for telephone booths	KRUMREICH CHARLES L ; MEEHAN HOWARD W	BELL TELEPHONE LABOR INC AMERICAN TELEPHONE & TELEGRAPH
2379052	June 26, 1945	Receiver for single side band systems	EARL WEAVER CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2379456	July 3, 1945	Telephone system	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2383908	August 28, 1945	Radio telephone system	FRANKLIN BOWERS ALBERT	AMERICAN TELEPHONE & TELEGRAPH
2383826	August 28, 1945	Line usage recorder circuit	BERNARD SPENCER FRED	AMERICAN TELEPHONE & TELEGRAPH
2383794	August 28, 1945	Telephone system	JOSEPH HAYES EARL	AMERICAN TELEPHONE & TELEGRAPH
2383788	August 28, 1945	Telegraph system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2383777	August 28, 1945	Subharmonic generator	BERNARD DALY JAMES	AMERICAN TELEPHONE & TELEGRAPH
2383770	August 28, 1945	Electrical measuring system	ARTHUR CARSON ; IRVING PAYNE	AMERICAN TELEPHONE & TELEGRAPH
2383759	August 28, 1945	Revertive pulse repeater	CAMPBELL AVERY ROBERT	AMERICAN TELEPHONE & TELEGRAPH
2388136	October 30, 1945	Party-line printing telegraph system	GARDNER LELAND A ; RICHARDS KENNETH W	BELL TELEPHONE LABOR INC AMERICAN TELEPHONE & TELEGRAPH
2389082	November 13, 1945	Code calling signal	STANLEY RHOADS CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2389076	November 13, 1945	Testing arrangement for trunks to community dial offices	PERRY ANTHONY T	AMERICAN TELEPHONE & TELEGRAPH
2393236	January 22, 1946	Subscribers' line testing system	EDMUND COREY HORACE ; FRANK WRIGHT	AMERICAN TELEPHONE & TELEGRAPH
2397887	April 2, 1946	Automatic alternate routing of interoffice calls	SCHROEPPEL HAROLD H	AMERICAN TELEPHONE & TELEGRAPH
2397885	April 2, 1946	Frequency diversity telegraph system	ANSON RHODES HAROLD	AMERICAN TELEPHONE & TELEGRAPH
2397884	April 2, 1946	Frequency diversity telegraph system	ANSON RHODES HAROLD	AMERICAN TELEPHONE & TELEGRAPH
2397881	April 2, 1946	Signaling system	DAVID NITTERAUER FRANKLIN	AMERICAN TELEPHONE & TELEGRAPH
2397848	April 2, 1946	Teletypewriter control system	RALEIGH EGGENSPERGER ARLO	AMERICAN TELEPHONE & TELEGRAPH
2397837	April 2, 1946	Apparatus for testing telephone lines	JESS CANNON FRANK ; ELLIS GOODWIN GEORGE	AMERICAN TELEPHONE & TELEGRAPH
2397830	April 2, 1946	Harmonic control system	AUSTIN BAILEY	AMERICAN TELEPHONE & TELEGRAPH
2397829	April 2, 1946	Telephone system	CAMPBELL AVERY ROBERT	AMERICAN TELEPHONE & TELEGRAPH
2401518	June 4, 1946	Power-driven wire reel mechanism	SMITH TEMPLE C ; BROWN HOWARD D	AMERICAN TELEPHONE & TELEGRAPH
2401507	June 4, 1946	Secrecy cipher system	PIERCE RALPH E ; PERRY DONALD B	AMERICAN TELEPHONE & TELEGRAPH
2401494	June 4, 1946	Secret signaling system	MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2401477	June 4, 1946	Teletypewriter secrecy system	LEE GREENE MONTE	AMERICAN TELEPHONE & TELEGRAPH
2401475	June 4, 1946	Teletypewriter secrecy system	OSMOND GAMMELL ERNEST	AMERICAN TELEPHONE & TELEGRAPH
2401474	June 4, 1946	Teletypewriter secrecy system	OSMOND GAMMELL ERNEST	AMERICAN TELEPHONE & TELEGRAPH
2401464	June 4, 1946	Privacy system	CLINTON CORDERMAN ROY	AMERICAN TELEPHONE & TELEGRAPH
2401454	June 4, 1946	Teletypewriter secrecy system	WALTER BEMIS EDWIN	AMERICAN TELEPHONE & TELEGRAPH
2403888	July 9, 1946	Enciphering and deciphering system	IRVING CRONBURG CLAUDE	AMERICAN TELEPHONE & TELEGRAPH
2405339	August 6, 1946	Equipment for observing dial tone speed	POWELL WILLIS MILTON	AMERICAN TELEPHONE & TELEGRAPH
2405332	August 6, 1946	Toll telephone diversion system	HENRY SCHROEPPEL HAROLD	AMERICAN TELEPHONE & TELEGRAPH
2405281	August 6, 1946	Object locater	WALTER BEMIS EDWIN	AMERICAN TELEPHONE & TELEGRAPH
2408304	September 24, 1946	Telegraph repeater system	HOMER FAY FRANK ; WILLIAM REEVE ELMER	AMERICAN TELEPHONE & TELEGRAPH
2408299	September 24, 1946	Selective signaling system	FENNER DAVIS ROWLAND	AMERICAN TELEPHONE & TELEGRAPH
2409632	October 22, 1946	Guiding means for self-propelled torpedoes	KING ROBERT W	AMERICAN TELEPHONE & TELEGRAPH
2414624	January 21, 1947	Apparatus for testing transmission lines	AUSTIN FISHER	AMERICAN TELEPHONE & TELEGRAPH
2414612	January 21, 1947	Testing insulation	ROSS CLAUDE M	AMERICAN TELEPHONE & TELEGRAPH
2414609	January 21, 1947	Electrical testing system	RHEUBOTTOM WILLARD C	AMERICAN TELEPHONE & TELEGRAPH
2418424	April 1, 1947	Electrical measuring device	MARSHALL PLYM LESTER	AMERICAN TELEPHONE & TELEGRAPH
2418406	April 1, 1947	Selective signaling system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2418401	April 1, 1947	Testing system for nontyping selectors	ELMORE FOLEY DANIEL ; DANIEL JOHNSON WALTER	AMERICAN TELEPHONE & TELEGRAPH
2418395	April 1, 1947	Control apparatus for forced drainage	GUSTAV CARLSON ERIC	AMERICAN TELEPHONE & TELEGRAPH
2421970	June 10, 1947	Earth boring machine	SMITH TEMPLE C	AMERICAN TELEPHONE & TELEGRAPH
2421954	June 10, 1947	Apparatus for indicating teletypewriter speeds	MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2421943	June 10, 1947	Telephone traffic indicating apparatus	WEATHERS HILL EDWARD	AMERICAN TELEPHONE & TELEGRAPH
2421919	June 10, 1947	Telephone routing system	CAMPBELL AVERY ROBERT	AMERICAN TELEPHONE & TELEGRAPH
2425820	August 19, 1947	Selective system	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2425819	August 19, 1947	Telegraph distortion measuring system	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2425818	August 19, 1947	Signaling apparatus	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2425801	August 19, 1947	Signaling system	HANLEY FRANK HAROLD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2432134	December 9, 1947	Directional radio system	BAGNALL VERNON B	AMERICAN TELEPHONE & TELEGRAPH
2438891	April 6, 1948	Telephone booth	BEARDSLEY HARRY I ; MEEHAN HOWARD W	BELL TELEPHONE LABOR INC AMERICAN TELEPHONE & TELEGRAPH
2454536	November 23, 1948	Control apparatus for forced drainage	RALPH WERNER DANIEL	AMERICAN TELEPHONE & TELEGRAPH
2460767	February 1, 1949	Control circuit for switching telegraph facilities	RUEMONT PIGMAN GEORGE	AMERICAN TELEPHONE & TELEGRAPH
2460936	February 8, 1949	Portable coin collector for telephone systems	JACKMAN WALTER P	AMERICAN TELEPHONE & TELEGRAPH
2466484	April 5, 1949	Subscriber ringing circuit	SCHROEPPEL HAROLD H.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2466354	April 5, 1949	Directional radio system	BAGNALL VERNON B.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2470145	May 17, 1949	Multifrequency signaling system	CLOS CHARLES	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2471087	May 24, 1949	Toll operator control for telephone coin collectors	ANDERSON GUSTAVE ADOLPH	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2471712	May 31, 1949	Intercommunication teletypewriter system	BACON WALTER M. ; WALKER CHARLES R.	BELL TELEPHONE LABORATORIES, INCORPORATED AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2472527	June 7, 1949	Drop wire clamp	GORDON CHESTER S. ; LALLY WILLIAM J. ; ZIESCHANG GUSTAV H.	BELL TELEPHONE LABORATORIES, INCORPORATED AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2472158	June 7, 1949	Radio beacon system	HENRY JAMES MATTHEW	AMERICAN TELEPHONE AND TELEPHONE COMPANY
2473346	June 14, 1949	Teletypewriter exchange system	RICHARDS KENNETH W.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2474658	June 28, 1949	Type pallet aligning jig	DORR GILBERT GARVIN	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2477309	July 26, 1949	Selective telegraph station calling system	MAXWELL JOLIN L	AMERICAN TELEPHONE & TELEGRAPH
2481112	September 6, 1949	Teletypewriter permutation code signal combination counter	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2481081	September 6, 1949	Means for aligning type pallets	GUSTAV CELVA WALTER	AMERICAN TELEPHONE & TELEGRAPH
2494323	January 10, 1950	Signal receiving apparatus	JR. EDWARD HENRY WEBER,	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2497710	February 14, 1950	Gaff guard for linemen's climbers	WOLLENSACK CLIFFORD NELSON	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2501883	March 28, 1950	Electronic frequency control for radio receivers	EARL WEAVER CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2509477	May 30, 1950	Coin control device for telephone coin collectors	ARTHUR CARSON ; MACKINZIE GASSMAN KENNETH	AMERICAN TELEPHONE & TELEGRAPH
2513400	July 4, 1950	Digit absorbing selector	ARTHUR CARSON ; TABOR CRONK EARLE	AMERICAN TELEPHONE & TELEGRAPH
2522003	September 12, 1950	Teletypewriter switching system	ROBERT WALKER CHARLES	AMERICAN TELEPHONE & TELEGRAPH
2522000	September 12, 1950	Recording telephone system	O'D SHEPHERD JUDSON	AMERICAN TELEPHONE & TELEGRAPH
2528269	October 31, 1950	Selector switch control for automatic telephone systems	DU BOIS DANIEL KING	AMERICAN TELEPHONE & TELEGRAPH
2533342	December 12, 1950	Tandem switching system	CAMPBELL AVERY ROBERT	AMERICAN TELEPHONE & TELEGRAPH
2535872	December 26, 1950	Signaling system	LEROY SHAFER WILLIAM	AMERICAN TELEPHONE & TELEGRAPH
2546334	March 27, 1951	Telephone substation having hearing aid facilities	BONAVENTURE DESNOES ARNOLD	AMERICAN TELEPHONE & TELEGRAPH
2547575	April 3, 1951	Telegraph repeater	WHITCOMB GILBO DE MOTTE	AMERICAN TELEPHONE & TELEGRAPH
2552704	May 15, 1951	Holder for books	ARMSTRONG FRANK C ; LAUTERBACH FREDERICK J ; WALTER LILLVIK ; POPPER JULIUS S	AMERICAN TELEPHONE & TELEGRAPH
2553978	May 22, 1951	Electronic control telegraph repeater for hub circuit operation in telegraph service boards	TRAPP NEISWINTER JAMES	AMERICAN TELEPHONE & TELEGRAPH
2560709	July 17, 1951	Clipping amplifier	WOODWARD WILLIAM REDIN	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2568019	September 18, 1951	Telegraph signal biasing set	MARTIN WADE B.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2569980	October 2, 1951	Motor control for signal responsive selector mechanism	RALEIGH EGGENSPERGER ARLO	AMERICAN TELEPHONE & TELEGRAPH
2569972	October 2, 1951	Two-wire test clip	BENNER ARCHIE CAROL ; GUEST WALTER LEROY	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2569926	October 2, 1951	Two-wire double commutation telegraph system	FAY FRANK H	AMERICAN TELEPHONE & TELEGRAPH
2584736	February 5, 1952	Telegraph switching system	PERRY DONALD B	AMERICAN TELEPHONE & TELEGRAPH
2588052	March 4, 1952	Control circuit for telephone systems	SHEPHERD JUDSON O'D.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2614632	October 21, 1952	Apparatus for recording numerals in code	CLOS CHARLES	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2617888	November 11, 1952	Line lockout arrangement	SHEPHERD JUDSON O'D.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2625609	January 13, 1953	Telegraph repeater	HANLEY FRANK H.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2625608	January 13, 1953	Open telegraph line indicator	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2630496	March 3, 1953	Two-way polar telegraph repeater	PHILIP HARFORD GEORGE	AMERICAN TELEPHONE & TELEGRAPH
2630493	March 3, 1953	Carrier telegraph system	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2632054	March 17, 1953	Hub telegraph repeater	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2635148	April 14, 1953	Crossbar telephone system with marker release and lockout of defective line	SHEPHERD JUDSON O'D.	AMERICAN TELEPHONE AND TELEPHONE COMPANY
2638497	May 12, 1953	Telegraph call transferring system	MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2640193	May 26, 1953	Radiant energy signaling system	WILLIAM CARTER ROBERT ; GRIFFITH CURRIER MILTON ; GEORGE EMIG WILLIAM ; VERLEY GLENTZER KENNETH	AMERICAN TELEPHONE & TELEGRAPH
2641644	June 9, 1953	Printing suppression mechanism for teletypewriters	WARREN BEYLAND SIDNEY	AMERICAN TELEPHONE & TELEGRAPH
2654807	October 6, 1953	Marker for allotting a link and a sender	SHEPHERD JUDSON O'D.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2664466	December 29, 1953	Multiway telegraph repeater system	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2672522	March 16, 1954	Delayed switchboard lamp system	OSBORN YEOMANS LUCIEN	AMERICAN TELEPHONE & TELEGRAPH
2677011	April 27, 1954	Teletypewriter message identification system	BURWELL GORDON E.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2684997	July 27, 1954	Telephone line finder circuit	THOMPSON BERT H	AMERICAN TELEPHONE & TELEGRAPH
2691064	October 5, 1954	Measuring circuits	SHEPHERD JUDSON O'D.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2698880	January 4, 1955	Calling line identifier	SHEPHERD JUDSON O'D.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2698879	January 4, 1955	Class of service determining circuit	SHEPHERD JUDSON O'D.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2707778	May 3, 1955	Control circuit with answer back and supervisory signals	NEISWINTER JAMES T.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2710891	June 14, 1955	Telegraph service board circuits	FITCH KARL E ; NEISWINTER JAMES T ; PURVIS MATTHEW R ; VANDERLIPPE RICHARD A	AMERICAN TELEPHONE & TELEGRAPH BELL TELEPHONE LABOR INC
2713122	July 12, 1955	Automatic frequency control	HENLEY EDWARD JOSEPH	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2713087	July 12, 1955	Full duplex telegraph repeater circuit	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2714701	August 2, 1955	Voltage regulation circuit	JOSEPH HENLEY EDWARD	AMERICAN TELEPHONE & TELEGRAPH
2719232	September 27, 1955	Method of calibrating an oscillator	EHRLICH ROBERT W	AMERICAN TELEPHONE & TELEGRAPH
2719878	October 4, 1955	Alarm circuit for timed impulse supply conductors	MEACHEN OREN R	AMERICAN TELEPHONE & TELEGRAPH
2721894	October 25, 1955	Telegraph loop loading	HAROLD HANLEY FRANK	AMERICAN TELEPHONE & TELEGRAPH
2722682	November 1, 1955	Two-way single sideband radio system	NEISWINTER JAMES T.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2726281	December 6, 1955	Telegraph code signal transmitter	HANLEY FRANK HAROLD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2736884	February 28, 1956	Overcurrent and undercurrent indicating lamp	OSBORN YEOMANS LUCIEN	AMERICAN TELEPHONE & TELEGRAPH
2739180	March 20, 1956	Message address intercommunicating telegraph system	BRITT HORACE J	AMERICAN TELEPHONE & TELEGRAPH
2750446	June 12, 1956	Code translating device	MARTIN WADE B	AMERICAN TELEPHONE & TELEGRAPH
2755445	July 17, 1956	Interconnection of transmission lines	RHODES HAROLD A.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2755345	July 17, 1956	Line insulation testing circuit	VAUPEL ERNEST WALTER	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2759144	August 14, 1956	Electrostatic probe	WHYMAN WALTER WILLIAM	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2761922	September 4, 1956	Automatic transmission measuring circuit for successively testing the idle trunks in a group of trunks	CARROLL WILLIAM R.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2761896	September 4, 1956	Telegraph repeater system	FOLEY DANIEL ELMORE ; HANLEY FRANK HAROLD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2763845	September 18, 1956	Short circuiting plug for coaxial line	THEODORE LAUBE OTTO	AMERICAN TELEPHONE & TELEGRAPH
2764753	September 25, 1956	Carrier failure alarm circuit	MARTIN WADE B.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2771511	November 20, 1956	Line clearing device for receiver-off-hook condition	MORRIS JR RICHARD S	AMERICAN TELEPHONE & TELEGRAPH
2776333	January 1, 1957	Teletypewriter code controlled selective device	NEISWINTER JAMES T.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2777900	January 15, 1957	Reduction of quadrature distortion	COWAN FRANK AUGUSTUS	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2777251	January 15, 1957	Self-oscillating double tone whistle	AUSTIN BAILEY	AMERICAN TELEPHONE & TELEGRAPH
2799739	July 16, 1957	Method and means for identifying conductor pairs	LOWMAN HENRY C. J. ; MURPHY EDWARD M. ; MUSGRAVE JOHN C. ; SOMERS MELVIN L.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2803706	August 20, 1957	Trunk circuit	ALTHOUSE HOMER C	AMERICAN TELEPHONE & TELEGRAPH
2804502	August 27, 1957	Coin collector	IWEMA BERNARD	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2810016	October 15, 1957	Key telephone set holding circuit	KNITTLE GALE L	AMERICAN TELEPHONE & TELEGRAPH
2820105	January 14, 1958	Telephone conference circuit	SWAN LUTHER L	AMERICAN TELEPHONE & TELEGRAPH
2826637	March 11, 1958	Automatic level equalizer	MACADAM WALTER K.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2831106	April 15, 1958	Stabilized automatic frequency control circuit with noise operated squelch	CLARK JEAN H.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2843682	July 15, 1958	Program transmission reversible network	JR. JOHN SCHRETZMAYER,	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2845478	July 29, 1958	Selective station calling system	ELMORE FOLEY DANIEL	AMERICAN TELEPHONE & TELEGRAPH
2861136	November 18, 1958	Switch mechanism for telephone apparatus	BRISON JORDAN W.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2863950	December 9, 1958	Telephone service concentrator	DUNNING SANFORD F. ; MACPHERSON DONALD H.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY BELL TELEPHONE LABORATORIES, INCORPORATED
2866005	December 23, 1958	Make-busy circuit for trunks in unattended dial office	KUPFERLE ARTHUR T.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2869015	January 13, 1959	Method of fabricating a grid electrode	BOLZ ALFRED R	AMERICAN TELEPHONE & TELEGRAPH
2878306	March 17, 1959	Teletypewriter testing system	SMITH WILLIAM R	AMERICAN TELEPHONE & TELEGRAPH
2886396	May 12, 1959	Drawer for storage of keys	ANTHONY HARRY E ; BURNHAM CHARLES S ; DE MENT JACK R ; HAHN GEORGE W ; HEPLER JR JOHN M	AMERICAN TELEPHONE & TELEGRAPH
2891117	June 16, 1959	Wave translating system	COLEMAN SIDNEY B.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2892888	June 30, 1959	Digital system with error elimination	JAMES RICHARD T. ; RUPPEL ALFRED E.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY BELL TELEPHONE LABORATORIES, INCORPORATED
2896020	July 21, 1959	Multiple transmitter control circuit	GOODMAN CHARLES J ; WALKER CHARLES R	AMERICAN TELEPHONE & TELEGRAPH
2901544	August 25, 1959	Four-party station identification circuit	COLLINS JOHN J.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2901542	August 25, 1959	"wake up" or "morning call" system for automatically signaling private branch exchange extension stations	HENCHES EUGENE W ; SHELDON IVAN R	AMERICAN TELEPHONE & TELEGRAPH
2908382	October 13, 1959	Display carrying unit for color telephone sets	TURNER HENRY G.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2909775	October 20, 1959	Antenna	BARNES RICHARD R	AMERICAN TELEPHONE & TELEGRAPH
2913526	November 17, 1959	Calling station identification circuit	SMITS JOHN M. ; STURTEVANT MICHAEL J.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2921116	January 12, 1960	Teletypewriter automatic alarm reporting system	MAKARY WILLIAM E	AMERICAN TELEPHONE & TELEGRAPH
2922847	January 26, 1960	Distributing system	DUNNING SANFORD F.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2929970	March 22, 1960	Telegraph repeater system	FOLEY DANIEL E. ; HANLEY FRANK H.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
2939915	June 7, 1960	Pulse measurement	BRITT HORACE J ; COSH FRANCIS R	AMERICAN TELEPHONE & TELEGRAPH
2947803	August 2, 1960	Clock controlled automatic recycling switching circuit	HANLEY FRANK H ; VOTAW CLARENCE J	AMERICAN TELEPHONE & TELEGRAPH
2948777	August 9, 1960	Test set for selector mechanism	ANDREWS CLAYTON F ; CHAMBERLIN DANIEL W ; NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2952733	September 13, 1960	Device for automatically producing teletypewriter signals	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2955151	October 4, 1960	Teletypewriter switching system	SEMANCIK JOSEPH T	AMERICAN TELEPHONE & TELEGRAPH
2958832	November 1, 1960	Differential-phase corrector	CLARK JEAN H	AMERICAN TELEPHONE & TELEGRAPH
2958831	November 1, 1960	Equalizer	CLARK JEAN H	AMERICAN TELEPHONE & TELEGRAPH
2961488	November 22, 1960	Permutation code selecting circuit	CAMERON PHILLIP G ; CLARK ORVILLE A ; MAXWELL JOHN L	AMERICAN TELEPHONE & TELEGRAPH
2965716	December 20, 1960	Telegraph switching apparatus	PRINCE GEORGE E	AMERICAN TELEPHONE & TELEGRAPH
2965713	December 20, 1960	Teletypewriter storage control system	BEYLAND SIDNEY W	AMERICAN TELEPHONE & TELEGRAPH
2978542	April 4, 1961	Impedance-matching network	HUXTABLE RUTH L	AMERICAN TELEPHONE & TELEGRAPH
2979556	April 11, 1961	Semiautomatic teletypewriter tape relay system	ANSPACH RUSSELL J ; CLARK ROBERT C ; NEISWINTER JAMES T ; TAMASI PROSPERO A	AMERICAN TELEPHONE & TELEGRAPH
2981803	April 25, 1961	Program switching system	BACHELET ALBERT E ; BIBBINS GEORGE S ; CELENTANO ARNOLD J ; PULLIS GEORGE A	BELL TELEPHONE LABOR INC AMERICAN TELEPHONE & TELEGRAPH
2981799	April 25, 1961	Data recording system	WINNIFRED RIGGEN	AMERICAN TELEPHONE & TELEGRAPH
2985720	May 23, 1961	Trunk concentrator	TWOMEY JR WILLIAM C	AMERICAN TELEPHONE & TELEGRAPH
2988712	June 13, 1961	Transmission network	RHODES HAROLD A	AMERICAN TELEPHONE & TELEGRAPH
2991353	July 4, 1961	Automatic frequency control for multitransmitter radio system	BARNES RICHARD R	AMERICAN TELEPHONE & TELEGRAPH
2991547	July 11, 1961	Tool for replacing jack studs	BURNS HERBERT W	AMERICAN TELEPHONE & TELEGRAPH
2993095	July 18, 1961	Private branch exchange telephone system involving a cordless type switchboard	ARNOLD PHILIP H ; DESNOES ARNOLD B ; DOUGLASS STEWART G ; WOOD EDSON R	AMERICAN TELEPHONE & TELEGRAPH
2993958	July 25, 1961	Radiant energy receiving system	BARNES RICHARD R	AMERICAN TELEPHONE & TELEGRAPH
2993952	July 25, 1961	System for testing sequential code selector	NEISWINTER JAMES T	AMERICAN TELEPHONE & TELEGRAPH
2997697	August 22, 1961	Data transmission system	MACADAM WALTER K	AMERICAN TELEPHONE & TELEGRAPH
2997543	August 22, 1961	Reduction of effect of hits on telegraph reception	BRITT HORACE J	AMERICAN TELEPHONE & TELEGRAPH
3019388	January 30, 1962	Signal timing circuit	THORBROGGER HOLGER H	AMERICAN TELEPHONE & TELEGRAPH
3020525	February 6, 1962	Record controlled translator	GARRISON RICHARD J ; HENCHES EUGENE W ; GEORGE SPIRO	AMERICAN TELEPHONE & TELEGRAPH
3021398	February 13, 1962	Continuous checking of circuit continuity of a signaling system	BARNETT CECIL H. ; LARGE WAYNE V. K. ; PRUDEN HAROLD M.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY BELL TELEPHONE LABORATORIES, INCORPORATED
3021397	February 13, 1962	Repeater for checking circuit continuity of a siganling system	BARNETT CECIL H. ; LARGE WAYNE V. K. ; PRUDEN HAROLD M.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY BELL TELEPHONE LABORATORIES, INCORPORATED
3038031	June 5, 1962	Permutation code selecting circuit	CLARK ORVILLE A. ; MAXWELL JOHN L. ; THOMPSON HAROLD K.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3041410	June 26, 1962	Delay busy circuit	STENGER WILLIAM J	AMERICAN TELEPHONE & TELEGRAPH
3043905	July 10, 1962	Tandem transmitter start system	SEMANCIK JOSEPH T ; WALKER CHARLES R	AMERICAN TELEPHONE & TELEGRAPH
3050584	August 21, 1962	Conference telephone apparatus	MILLER WADE M	AMERICAN TELEPHONE & TELEGRAPH
3054949	September 18, 1962	Method of and apparatus for identifying discrete tip and ring conductor pairs in telephone cable	BATES GEORGE W ; CLARK ROBERT F	AMERICAN TELEPHONE & TELEGRAPH
3056855	October 2, 1962	Code translator	YEOMAN JOHN A	AMERICAN TELEPHONE & TELEGRAPH
3057965	October 9, 1962	Braille telephone switchboard unit	BANKS HARRY R ; CHARLES NICKERSON	AMERICAN TELEPHONE & TELEGRAPH
3078336	February 19, 1963	Teletypewriter message distributing system	CAMERON PHILLIP G. ; MAXWELL JOHN L.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3082299	March 19, 1963	Alarm testing device	RETER GEORGE A	AMERICAN TELEPHONE & TELEGRAPH
3099718	July 30, 1963	Universal line concentrator	FISHER RICHARD G	AMERICAN TELEPHONE & TELEGRAPH
3101393	August 20, 1963	Cordless type switchboard	DESNOES ARNOLD B ; FULLERTON DICK P ; SHEA PHILIP D	AMERICAN TELEPHONE & TELEGRAPH
3105883	October 1, 1963	Pressure transducer testing circuit	HIGSON JR GEORGE E	AMERICAN TELEPHONE & TELEGRAPH
3105882	October 1, 1963	Pressure transducer testing circuit	MEYER WILLIAM C	AMERICAN TELEPHONE & TELEGRAPH
3111561	November 19, 1963	Intercept equipment	DUNNING SANFORD F	AMERICAN TELEPHONE & TELEGRAPH
3115552	December 24, 1963	Telephone switching system	FULWILER EDWARD R ; HAYES RICHARD L ; MASUCCI EUGENE D ; WILSON WARREN M	AMERICAN TELEPHONE & TELEGRAPH
3115551	December 24, 1963	Crossbar switch station concentrator	PLYER ROGER A	AMERICAN TELEPHONE & TELEGRAPH
3122611	February 25, 1964	Rate determining equipment	WHEELER CHARLES L.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3135833	June 2, 1964	Transmission loss pad control system	MACLEOD DONALD A	AMERICAN TELEPHONE & TELEGRAPH
3137770	June 16, 1964	Telephone call holding arrangement	DOYLE MICHAEL E	AMERICAN TELEPHONE & TELEGRAPH
3142728	July 28, 1964	Call distributing circuit	MACLEOD DONALD A	AMERICAN TELEPHONE & TELEGRAPH
3144707	August 18, 1964	Dismantling tool	HIESTAND IRVIN H	AMERICAN TELEPHONE & TELEGRAPH
3156773	November 10, 1964	Telephone message unit recording system	LAMBERT FREERICKS ; KUKASCH HERBERT L ; LUZON THOMAS B	AMERICAN TELEPHONE & TELEGRAPH
3156772	November 10, 1964	Telephone message unit recording system	LAMBERT FREERICKS ; KUKASCH HERBERT L ; LUZON THOMAS B	AMERICAN TELEPHONE & TELEGRAPH
3179931	April 20, 1965	Alarm transfer system	MIDDAUGH JACK K	AMERICAN TELEPHONE & TELEGRAPH
3179750	April 20, 1965	Pbx in-dialing circuit	REILLY WILLIAM M	AMERICAN TELEPHONE & TELEGRAPH
3181062	April 27, 1965	Two-wire test clip with integral capacitive probe	SCARLETT REECE M	AMERICAN TELEPHONE & TELEGRAPH
3185773	May 25, 1965	Switching system channel selection	ENGEMAN JOHN C ; FRING JR LEO ; HARTMANN GEORGE J	AMERICAN TELEPHONE & TELEGRAPH
3214523	October 26, 1965	Automatic telephone system with camp-on facilities	HESS BOBBY L	AMERICAN TELEPHONE & TELEGRAPH
3226088	December 28, 1965	Apparatus for pulling cable through underground conduit	HABIGHORST HENRY J	AMERICAN TELEPHONE & TELEGRAPH
3246082	April 12, 1966	Telephone hold program system	ALFRED LEVY	ALFRED LEVY
3250859	May 10, 1966	Universal line concentrator	FISHER RICHARD G	AMERICAN TELEPHONE & TELEGRAPH
3252088	May 17, 1966	Apparatus for identifying conductor pairs in a multipair telephone cable	LEWIS PALMER J F	AMERICAN TELEPHONE & TELEGRAPH
3266018	August 9, 1966	Telemetering system for reading remotely loacted utility meters	HIGGINS NEIL S	AMERICAN TELEPHONE & TELEGRAPH
3275754	September 27, 1966	Call distributing circuit	HOWELL JESSE O ; MACLEOD DONALD A	AMERICAN TELEPHONE & TELEGRAPH
3283083	November 1, 1966	Telephone subscriber's line circuit	MACLEOD DONALD A	AMERICAN TELEPHONE & TELEGRAPH
3287509	November 22, 1966	Apparatus to visually identify cable pairs in a multipair cable by cable pair encoding means	BOHNENBLUST CLARENCE E	AMERICAN TELEPHONE & TELEGRAPH
3288944	November 29, 1966	Apparatus to audibly identify individual conductors in a multiconductor cable	FLEMING NORMAN P	AMERICAN TELEPHONE & TELEGRAPH
3288943	November 29, 1966	Apparatus to visually identify conductor pairs in a multipair cable	BOHNENBLUST CLARENCE E	AMERICAN TELEPHONE & TELEGRAPH
3293370	December 20, 1966	Make busy line circuit for key telephone systems	MACLEOD DONALD A	AMERICAN TELEPHONE & TELEGRAPH
3301968	January 31, 1967	Telephone signaling device	WURST FRANCIS K	AMERICAN TELEPHONE & TELEGRAPH
3301967	January 31, 1967	Automatic call transmitter for repertory dialing using multifreqency pulses	PLYER ROGER A	AMERICAN TELEPHONE & TELEGRAPH
3311709	March 28, 1967	Multidigit register circuit having random interrogating means	ANDREW BONTEMPO	AMERICAN TELEPHONE & TELEGRAPH
3322901	May 30, 1967	Pbx dial conference trunk circuit	TRIMMER DANIEL R	AMERICAN TELEPHONE & TELEGRAPH
3342928	September 19, 1967	Splice closures	FORNEY JAMES M	AMERICAN TELEPHONE & TELEGRAPH
3347990	October 17, 1967	Stock quotation switching system utilizing calling rate detection means	DOYLE JAMES J ; SARKA AUGUST J ; TANCREDI FREDERICK C	AMERICAN TELEPHONE & TELEGRAPH
3355556	November 28, 1967	Automatic mobile radio telephone switching system	CHANEY RALPH A	AMERICAN TELEPHONE & TELEGRAPH
3362419	January 9, 1968	Cable splicing umbrella	FEYERHERM WILLARD J.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3366880	January 30, 1968	Tone controlled wireless telephone extension system	DRIVER JOEL P.	AMERICAN TELEPHONE EXTENSION CORPORATION
3377441	April 9, 1968	Delay equalizer computer	BOMAR HOWARD E. ; CLINE HARRY A.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3379838	April 23, 1968	Telephone dial tone delay measuring circuit	JR. JAMES W. WATKINS,	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3384717	May 21, 1968	Cordless dispatch telephone switching system having conferencing means	COSTON SEMER H.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3387091	June 4, 1968	Alarm system for telephone pay stations	DEIKER ROBERT W.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3389234	June 18, 1968	Access control in telephone testing systems	COTNER J. ARTHUR	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3393274	July 16, 1968	Subscriber loop and trunk loop range extension circuit	INGRAHAM FRANK S.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3398234	August 20, 1968	Multiple address circuit	THOMAS ROBERT L.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3418455	December 24, 1968	Matched mailing detection system	RACKLIFFE LEROY J. ; RAU RODNEY G.	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3456240	July 15, 1969	METHOD AND ARRANGEMENT FOR SIGNALING IN A REMOTE CONTROL SYSTEM	BRUCE C. HAYS	AMERICAN TELEPHONE & TELEGRAPH CO.
3478174	November 11, 1969	CALL DISTRIBUTING CIRCUIT UTILIZING SEQUENTIAL ACTIVATION OF STATION RINGERS	MACLEOD DONALD A ; MADDOCK GEORGE P	AMERICAN TELEPHONE & TELEGRAPH
3721887	March 20, 1973	BATTERY PROTECTION CIRCUIT	NICKERSON C	AMERICAN TELEPHONE & TELEGRAPH
3912874	October 14, 1975	CONFERENCE ARRANGEMENT	BOTTERELL; JOHN JOSEPH ; DAYTON; ROBERT LEWIS ; GUYLER; JAMES RAYMOND	AMERICAN TELEPHONE AND TELEGRAPH COMPANY
3914561	October 21, 1975	APPARATUS AND METHOD FOR TRACING JUMPERS IN A MAIN DISTRIBUTING FRAME	SCHARDT COURTNEY HAROLD ; SCHEPIS ALBERT JAMES	AMERICAN TELEPHONE & TELEGRAPH
3980840	September 14, 1976	Conductor identification arrangement for a cable restoration system	Koster, Frederick Henry - Granite Springs, New York, United States (US)	American Telephone and Telegraph Company, New York, New York, United States (US), United States company or corporation (02)
4020295	April 26, 1977	Rotary dial restriction circuit	Vuotto, Edward Joseph - Katonah, United States of America (US)	American Telephone and Telegraph Company, New York, United States of America (US)
4027104	May 31, 1977	Arrangement for automatically generating alternate telephone station identification codes	Levitt, Arthur Paul - Hauppauge, United States of America (US) ; Oakley, Robert Vincent - New City, United States of America (US) ; Patterson, Roy Earl - Bay Shore, United States of America (US)	American Telephone and Telegraph Company, New York, United States of America (US)
4093826	June 6, 1978	Tone signaling conversion apparatus	Koster, Frederick Henry - Granite Springs, New York, United States (US)	American Telephone and Telegraph Inc., New York, New York, United States (US), United States company or corporation (02)
4112247	September 5, 1978	Gas feeder pipe assembly including electrical conductors	Dembiak, Matthew R. - Clifton, New Jersey, United States (US)Finnegan, John F. - Claymont, Delaware, United States (US); Reece, Thomas B. - Wilmington, Delaware, United States (US); Rudolph, Howard W. - Birdsboro, Pennsylvania, United States (US)	Western Electric Company, Inc., New York, New York, United States (US), United States company or corporation (02) American Telephone & Telegraph Co., Inc., New York, New York, United States (US), United States company or corporation (02)
4165446	August 21, 1979	Data transmission systems (using internal systems equipment, services and procedures of telephone companies)	Flowers, Thomas E. - 155 Jackson St., #2003, San Francisco, United States of America (US) ; MacDonnell, Gordon S. - 2 Everson St., San Francisco, United States of America (US)	FLOWERS; THOMAS E. MACDONNELL; GORDON S.
4175271	November 20, 1979	Helical video tape insert recording editing method with flying erase head and servo control	Kaemmerer, Harry - Franklin Township, Somerset Couty, United States of America (US)	American Telephone and Telegraph, New York, United States of America (US)
4395594	July 26, 1983	Method and apparatus for forcing randomization of idle channel seizures	MEYERLE; JOHN A.	BELL TELEPHONE LABORATORIES, INCORPORATED
4464650	August 7, 1984	Apparatus and method for compressing data signals and restoring the compressed data signals	EASTMAN WILLARD L - ; LEMPEL ABRAHAM - ; ZIV JACOB - ; COHN MARTIN -	SPERRY CORP, United States of America (US)
4467523	August 28, 1984	Methods of and apparatus for inserting pins into a substrate	Chisholm, William M. - Midlothian, United States of America (US)	AT&T Technologies, Inc., New York, United States of America (US)
4485370	November 27, 1984	Thin film bar resistor	Poisel, C. Edward - Indianapolis, United States of America (US)	AT&T Technologies, Inc., New York, United States of America (US)
D277379	January 29, 1985	Handset telephone instrument	Cooke, Kenneth R. - New York, United States of America (US) ; Porcelli, Vito L. - Ossining, United States of America (US)	AT&T Technologies, Inc., New York, United States of America (US)
D277378	January 29, 1985	Handset telephone instrument	Cooke, Kenneth R. - New York, United States of America (US) ; Porcelli, Vito L. - Ossining, United States of America (US)	AT&T Technologies, Inc., New York, United States of America (US)
D277480	February 5, 1985	Wall telephone stand or similar article	Jackwicz, William V. - Spring Lake Heights, New Jersey, United States (US)Jampathom, Sompoppol - Ocean, New Jersey, United States (US); McGarvey, John N. - Drexel Hill, Pennsylvania, United States (US); Tilley, Alvin R. - Red Bank, New Jersey, United States (US)	AT&T Technologies, New York, New York, United States (US), United States company or corporation (02)
D277479	February 5, 1985	Telephone stand	Genaro, Donald M. - Haworth, United States of America (US) ; McGarvey, John N. - Drexel Hill, United States of America (US) ; Stern, Arthur L. - Noblesville, United States of America (US) ; Tilley, Alvin R. - Red Bank, United States of America (US)	AT&T Technologies, New York, United States of America (US)
D277958	March 12, 1985	Telephone instrument base for a handset	Cooke, Kenneth R. - New York, New York, United States (US)Porcelli, Vito L. - Ossining, New York, United States (US)	AT&T Technologies, Inc., New York, New York, United States (US), United States company or corporation (02)
4516250	May 7, 1985	Frequency and phase comparator with slip detection capability	Grimes, Gary J. - Thornton, United States of America (US)	AT&T Information Systems, Holmdel, United States of America (US)
D279005	May 28, 1985	Housing for a telephone handset or similar article	Genaro, Donald M. - Haworth, New Jersey, United States (US)Joffe, Richard M. - Palisades Park, New Jersey, United States (US); McGarvey, John N. - Drexel Hill, Pennsylvania, United States (US)	AT&T Technologies, Inc., Berkeley Heights, New Jersey, United States (US), United States company or corporation (02)
4533795	August 6, 1985	Integrated electroacoustic transducer	Baumhauer, John C. - Indianapolis, United States of America (US) ; Hershey, Harold J. - Indianapolis, United States of America (US) ; Poteat, Tommy L. - Bridgewater, United States of America (US)	American Telephone and Telegraph, New York, United States of America (US) AT&T Bell Laboratories, Murray Hill, United States of America (US)
4537799	August 27, 1985	Selective metallization process	DOREY II JOHN K - ; SCHMIDT STEVEN L - ; TOWNSEND WESLEY P -	AT & T TECHNOLOGIES INC, United States of America (US)
4542439	September 17, 1985	Surface mount component	Dick, Bernard M. - Lee's Summit, Missouri, United States (US)	AT&T Technologies, Inc., New York, New York, United States (US), United States company or corporation (02)
4547644	October 15, 1985	Apparatus for heating a preform from which lightguide fiber is drawn	Bair, Wallace C. - Atlanta, United States of America (US) ; Myers, Daryl L. - Lawrenceville, United States of America (US) ; Rogers, Jane W. - Atlanta, United States of America (US)	AT&T Technologies, Inc., Berkeley Heights, United States of America (US)
D281599	December 3, 1985	Housing for a telephone stand	Joffe, Richard M. - Palisades Park, New Jersey, United States (US)McGarvey, John N. - Drexel, Pennsylvania, United States (US)	AT&T Technologies, Inc., Berkeley Heights, New Jersey, United States (US), United States company or corporation (02)