TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES T.R.T.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5977902 Process for producing an automatic command for an anti-tank trap and igniter for implementing the processExpiredDec 18, 87Nov 02, 99[G01S, F42C]
5504778 Analog circuit for baseband modemExpiredMay 23, 94Apr 02, 96[H04B]
5467126 Thermography system with full-screen digital enlargement with camera using series-parallel scanningExpiredOct 21, 85Nov 14, 95[H04N, G02B]
5181229 Data transmission arrangement using a statistic coding, a transmitter and a receiver section suitable for such an arrangementExpiredDec 28, 89Jan 19, 93[H04N]
5159704 Transceiver arrangement for optimizing received signal levelsExpiredDec 14, 89Oct 27, 92[H04B]
4980647 Arrangement for measuring and cancelling bias distortion in binary signals of the type not comprising any zero-frequency spectral componentsExpiredApr 06, 89Dec 25, 90[H03K]
4969191 Fully digital phase-locked loopExpiredOct 30, 87Nov 06, 90[H04L]
4878433 Device for neutralizing military objectsExpiredApr 12, 83Nov 07, 89[F42B]
4852166 Analogue scrambling system with dynamic band permutationExpiredOct 30, 87Jul 25, 89[H04K]
4827472 Echo canceller using delta modulationExpiredAug 09, 85May 02, 89[H04B]
4799179 Signal analysing and synthesizing filter bank systemExpiredJan 27, 86Jan 17, 89[G06F]
4730912 Distortionless sight utilizing holographic componentsExpiredNov 16, 84Mar 15, 88[G02B]
4724482 Infrared thermography system with sensitivity improved by progressive accumulation of image linesExpiredOct 19, 84Feb 09, 88[H04N, G02B]
4687933 Optical and mechanical scanning deviceExpiredDec 09, 77Aug 18, 87[G02B]
4686330 Telephone switching systemExpiredDec 16, 83Aug 11, 87[H04Q]
4674826 Optico-mechanical scanning deviceExpiredOct 05, 79Jun 23, 87[G02B]
4661818 Electronically adjustable delay-simulator for distance-measuring apparatus operating on the frequency-modulated continuous wave principleExpiredOct 13, 83Apr 28, 87[G01S]
4645884 Method and apparatus for initializing filter coefficients in an echo cancellerExpiredJan 30, 84Feb 24, 87[H04B]
4577329 Self-adaptive equalizer for baseband data signalsExpiredOct 06, 83Mar 18, 86[H03K, H04B, H03H]
4573165 Transmission circuit for modems employing frequency shift keyingExpiredJun 24, 83Feb 25, 86[H03K, H03C]

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