Compagnie Industrielle des Telecommunications Cit-Alcatel

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4,935,866 Multiprocessor control systemExpiredApr 05, 82Jun 19, 90[G06F]
4,893,309 Digital interface between at least two subscriber line interface circuits and a processing unitExpiredJan 25, 88Jan 09, 90[H04J]
4,881,226 Digital interface of an integrated subscriber line interface circuitExpiredJan 25, 88Nov 14, 89[H04J]
4,727,540 Apparatus for remote signalling on a digital transmission linkExpiredNov 27, 85Feb 23, 88[H04J]
4,723,285 Methods of broadcasting and receiving high quality sound programs and a receiver deviceExpiredMay 29, 85Feb 02, 88[H04H]
4,713,805 Method and device for selecting one station from a set of stations dialoging with a main stationExpiredSep 20, 84Dec 15, 87[H04J, H04Q]
4,701,013 Optical source with optical fiber carrierExpiredNov 13, 85Oct 20, 87[G02B]
4,689,783 Digital satellite exchangeExpiredAug 06, 84Aug 25, 87[H04Q]
4,689,790 Method and apparatus for remote signalling on a digital transmission linkExpiredNov 27, 85Aug 25, 87[H04J]
4,685,100 Digital trunk adapter terminal unitExpiredJun 12, 85Aug 04, 87[H04J, H04Q]
4,682,334 Synchronous data transmission method and device implementing sameExpiredMay 20, 85Jul 21, 87[G08C, H03K]
4,679,163 Inverse discrete cosine transform calculation processorExpiredMar 08, 85Jul 07, 87[G06F]
4,676,644 Device for monitoring the thickness of thin layersExpiredNov 19, 84Jun 30, 87[G01B]
4,677,644 Method and apparatus for remote signalling by substituting a message for the data conveyed by a digital transmission linkExpiredNov 27, 85Jun 30, 87[H04L]
4,675,836 Discrete cosine transform calculation processorExpiredMar 08, 85Jun 23, 87[G06F]
4,675,886 Frame synchronization deviceExpiredAug 19, 85Jun 23, 87[H04L]
4,667,320 Space-division switching network for high data rate signalsExpiredMar 26, 85May 19, 87[H04L, H04Q]
4,656,350 Opto-electronic selector having a plurality of optical signal inletsExpiredJun 13, 85Apr 07, 87[H01J]
4,653,849 Optical space-division switching assemblyExpiredMay 30, 84Mar 31, 87[G02B]
4,653,850 Space division optoelectronic switch deviceExpiredMay 30, 84Mar 31, 87[G02B]

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