WIRELESS COMMUNICATIONS PRODUCTS, LLC

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6426819 Method and apparatus for cordless infrared communicationExpiredFeb 17, 98Jul 30, 02[H04J]
5969842 Method and apparatus for cordless infrared communicationExpiredFeb 17, 98Oct 19, 99[H04B]
5867292 Method and apparatus for cordless infrared communicationExpiredMar 22, 96Feb 02, 99[H04B]
5621384 Infrared communicating deviceExpiredOct 06, 95Apr 15, 97[G08B]
5351149 ASK optical transmitterExpiredMar 25, 93Sep 27, 94[H04B]
5319191 Ask receiver with signal delay and stretchingExpiredMar 25, 93Jun 07, 94[H01J]
5103108 Distributed infrared communication systemExpiredSep 18, 90Apr 07, 92[G01J]
4977619 Distributed infrared communication systemExpiredJul 01, 88Dec 11, 90[H04J]
4757553 Communication system with portable unitExpiredJun 12, 84Jul 12, 88[H04B]
4533267 Ribbon driving mechanism for typewriterExpiredJul 05, 83Aug 06, 85[B41J]
4450319 Infrared telephone extension control systemExpiredJul 31, 81May 22, 84[H04B]

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