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Publication numberUS2345048 A
Publication typeGrant
Publication dateMar 28, 1944
Filing dateNov 13, 1941
Priority dateNov 13, 1941
Publication numberUS 2345048 A, US 2345048A, US-A-2345048, US2345048 A, US2345048A
InventorsHubbard Francis A, Matthies William H, Oscar Myers
Original AssigneeBell Telephone Labor Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Communication system
US 2345048 A
Abstract  available in
Images(21)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

March 28, 1944. F. A. HUBBARD E-rAL- COMMUNICATION SYSTEM Filed Nov. 1s, 1941 21 Sheets-Sheet 1 March 2s, 1944. F, A, HUB-BAR.; ETA.. 2,345,048

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COMMUNICATION SYSTEM Filed NOV. 13, 1941 21 Sheets-Sheet 13 T0 CHANNEL CON TOL RE L A Y S OJJYERS. BV

ATTORNEY March' 28,` 1944.

F. A. HUBBARD ETAL I 2,345,048

` COMMUNICATION SYSTEM A Filed Nov. 13,1941 21 sheets-sheet 14 "F, A. HUMA/1o /N VEN roes.' W. H. MA r rH/Es O MYERS BV AHORA/5y COMMUNICATION SYSTEM Filed Nov. 1:5, 1941 V 21 sheets-sheet' 15 SO bk S .mi

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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2590672 *Jun 29, 1950Mar 25, 1952Automatic Elect LabCarrier system having variable power level for supervisory signaling
US2603717 *Jul 10, 1947Jul 15, 1952Automatic Elect LabCarrier telephone system
US2607853 *Jan 24, 1948Aug 19, 1952British Telecomm Res LtdTelecommunication system
US2691068 *Dec 11, 1950Oct 5, 1954Stromberg Carlson CoTwo-way carrier type trunk circuit
US3986020 *Sep 25, 1975Oct 12, 1976Bell Telephone Laboratories, IncorporatedCommon medium optical multichannel exchange and switching system
US5442379 *Jul 15, 1993Aug 15, 1995Metheus CorporationHigh speed RAMDAC with reconfigurable color palette
Classifications
U.S. Classification370/430, 379/246, 379/275
International ClassificationH04Q3/42
Cooperative ClassificationH04Q3/42
European ClassificationH04Q3/42