AT&T and Philips Telecommunications B.V.
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Apr 24, 1990 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 354 Total Citation Count
- Jun 17, 1986 Earliest Filing
- 17 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
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Recent Publications
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Recent Patents
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Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
4920530 Adaptive time-discrete filter for forming a cancelling signal from synchronous data symbolsExpiredDec 15, 87Apr 24, 90[H04J]
4849964 Multistage switching system for switching N1 input channels to N2 output channelsExpiredJan 07, 88Jul 18, 89[H04Q]
4817081 Adaptive filter for producing an echo cancellation signal in a transceiver system for duplex digital communication through one single pair of conductorsExpiredMar 20, 87Mar 28, 89[H04B]
4811335 Broadband/narrow-band switching network of the time-space-time type and time and space switching stages for broadband/narrow-band channelsExpiredMar 03, 87Mar 07, 89[H04Q]
4809263 T-type switching system for broadband switching system and time switching stage for use in a t-stageExpiredMar 03, 87Feb 28, 89[H04Q]
4796254 Broadband space switching network and parallel-series converter and series-parallel converter for use in such a space switching networkExpiredMar 03, 87Jan 03, 89[H04J]
4759018 Higher order digital transmission system including a multiplexer and a demultiplexerExpiredJun 17, 86Jul 19, 88[H04J]
4746902 Arrangement for compensating for non-linear distortion in an input signal to be digitized and an echo cancelling system comprising such a arrangementExpiredMar 20, 87May 24, 88[H03M]
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