Le Materiel Telephonique Thomson-CSF

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4507747 Procedure for shared-time processing of digital signals and application to a multiplexed self-adapting echo cancelerExpiredJan 14, 83Mar 26, 85[G06F]
4420832 Concentrator-deconcentrator devicesExpiredApr 21, 80Dec 13, 83[H04Q]
4373151 Stochastic demodulator for phase jump-modulated signals, operating in time divided up over several channelsExpiredApr 08, 80Feb 08, 83[H04L]
4371343 Process and systems for the electronic generation of wide-angle moving images for training in the navigation of shipsExpiredFeb 28, 80Feb 01, 83[G09B]
4365863 Optical switch for a very large number of channelsExpiredMay 29, 80Dec 28, 82[H04B]
4345326 Switching network and telecommunications center comprising such a networkExpiredJun 11, 80Aug 17, 82[H04Q]
4338604 Pulsed coherent doppler radar with frequency agilityExpiredJul 29, 80Jul 06, 82[G01S]
4336600 Binary word processing method using a high-speed sequential adderExpiredApr 10, 80Jun 22, 82[G06F]
4334216 Electronic device for monitoring the operation of a servo system including a hydraulic jackExpiredNov 08, 79Jun 08, 82[G08B]
4327442 Clock recovery deviceExpiredMar 20, 80Apr 27, 82[H03B]
4323980 Digital filter for shared-time processing on several channelsExpiredJan 17, 80Apr 06, 82[G06F]
4317008 Modular time-division switching networkExpiredApr 25, 80Feb 23, 82[H04Q]
4314367 Switching circuit for digital packet switching networkExpiredJan 17, 80Feb 02, 82[H04Q, H04J]
4306118 Telephone set ringing current injection deviceExpiredSep 14, 79Dec 15, 81[H04M]
4302836 Monitoring circuit for time-division switching networkExpiredNov 20, 79Nov 24, 81[H04J]
4292479 Separation and balance device for telephone exchangesExpiredSep 14, 79Sep 29, 81[H04B]
4229142 One-piece pumping device with ambivalent operationExpiredNov 06, 78Oct 21, 80[F04B]

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