ITT Defense Communications, A Division Of ITT Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4856030 Apparatus and methods of locking a receiving modem to a transmitting modem employing a burst signalExpiredJul 20, 88Aug 08, 89[H04B]
4837721 Digital divider with integer and fractional division capabilityExpiredJun 30, 86Jun 06, 89[H03K, G06F]
4837830 Multiple parameter speaker recognition system and methodsExpiredJan 16, 87Jun 06, 89[G10L]
4822141 Liquid crystal beam splitterExpiredAug 13, 86Apr 18, 89[G02F]
4813769 Liquid crystal wave division deviceExpiredNov 05, 85Mar 21, 89[G02F]
4811399 Apparatus and method for automatic speech recognitionExpiredJun 14, 88Mar 07, 89[G10L]
4792212 Liquid crystal switching deviceExpiredSep 30, 86Dec 20, 88[G02F]
4790633 Liquid crystal switching apparatusExpiredSep 30, 86Dec 13, 88[G02F]
4784470 Optical switching deviceExpiredNov 05, 85Nov 15, 88[G02F]
4781426 Optical fiber collimator/switch including liquid crystal polarizing materialExpiredSep 30, 86Nov 01, 88[G02B, G02F]
4775972 Optical fiber communication for local area networks with frequency-division-multiplexingExpiredMay 10, 85Oct 04, 88[H04B]
4773093 Text-independent speaker recognition system and method based on acoustic segment matchingExpiredDec 31, 84Sep 20, 88[G10L]
4771422 Priority user protection in multiple priority switching systemsExpiredDec 04, 86Sep 13, 88[H04J]
4768862 Liquid crystal polarization reorientation cell having magnetic field-applying coilsExpiredAug 13, 86Sep 06, 88[G02F]
4768191 Digital data and orderwire combiner apparatusExpiredOct 01, 86Aug 30, 88[H04J]
4761796 High frequency spread spectrum communication system terminalExpiredJan 24, 85Aug 02, 88[H04L]
4755038 Liquid crystal switching device using the brewster angleExpiredSep 30, 86Jul 05, 88[G02F]
4752926 Orderwire detector for communication systemsExpiredOct 01, 86Jun 21, 88[H04B]
4739446 Header for a wafer scale assemblyExpiredMay 05, 86Apr 19, 88[H05K]
4737019 Liquid crystal optical switching device having minimized internal light pathExpiredNov 05, 85Apr 12, 88[G02B, G02F]

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