Photonics Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5760942 Noise tolerant receiver for wideband optical transmission systemExpiredNov 28, 95Jun 02, 98[H04B]
5563728 Infrared communication repeater architectureExpiredFeb 22, 91Oct 08, 96[H04B]
5384652 Infrared communication repeater architectureExpiredJan 06, 93Jan 24, 95[H04B]
D351158 Infrared digital transceiverExpiredMar 10, 92Oct 04, 94[]
5245460 Infrared network entry permission method and apparatusExpiredJun 02, 92Sep 14, 93[H04B]
D336089 Infrared data tranceiverExpiredAug 16, 89Jun 01, 93[]
5191461 Infrared network transceiver apparatusExpiredMay 16, 91Mar 02, 93[H04B]
5142538 Link protocol for RS 232 communicationsExpiredApr 19, 90Aug 25, 92[H04L, G08C]
5124991 Error correction for infrared data communicationExpiredMar 30, 89Jun 23, 92[G08C]
5119226 Infrared network entry permission apparatusExpiredMar 30, 89Jun 02, 92[H04B, H04J]
4977618 Infrared data communicationsExpiredApr 21, 88Dec 11, 90[H04B, H04J]

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