TELTREND INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6301108 Chassis containing electronic components with fire containment trap doorExpiredDec 27, 99Oct 09, 01[H05K]
5907614 High density telephone network interface unitExpiredApr 10, 97May 25, 99[H04M]
5691998 Data transmission protection circuit with error correctionExpiredMay 10, 95Nov 25, 97[G06F]
5689546 Performance monitoring system for T1 telephone linesExpiredJun 06, 95Nov 18, 97[H04M]
5631956 High density telephone network interface unitExpiredMay 17, 96May 20, 97[H04M]
5566239 Floating digital loop carrier telephone interfaceExpiredJun 07, 94Oct 15, 96[H04M]
5437023 Noise-tolerant address transmission system for digital telecommunication networkExpiredFeb 09, 94Jul 25, 95[G06F]
5422950 Remote terminal channel unit for telephone transmission linesExpiredJul 28, 94Jun 06, 95[H04M]
5357569 Trans-hybrid loss compensator for on hook transmissionExpiredMay 03, 93Oct 18, 94[H04M]
5347544 Gain or loss compensation circuit for telephone linesExpiredMay 03, 93Sep 13, 94[H04B]
5315650 Caller identification transmit path limiterExpiredMay 03, 93May 24, 94[H04M]

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