Datapoint Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5903302 Automated video call distributionExpiredOct 04, 96May 11, 99[H04N]
5555277 Technique for cancelling common mode switching noise to achieve reduced error rates in a local area networkExpiredDec 01, 93Sep 10, 96[H03D]
5077732 LAN with dynamically selectable multiple operational capabilitiesExpiredJul 24, 90Dec 31, 91[H04J]
5050189 Multibit amplitude and phase modulation transceiver for LANExpiredNov 14, 88Sep 17, 91[H04L]
5048014 Dynamic network reconfiguration technique for directed-token expanded-address LANExpiredJul 24, 90Sep 10, 91[H04J]
5034967 Metastable-free digital synchronizer with low phase errorExpiredDec 16, 88Jul 23, 91[H04L]
5014267 Video conferencing networkExpiredApr 06, 89May 07, 91[H04Q]
5008879 LAN with interoperative multiple operational capabilitiesExpiredNov 14, 88Apr 16, 91[H04L]
5001472 Uneven token distribution technique for token based local area networkExpiredFeb 11, 88Mar 19, 91[H04Q]
4941089 Input/output network for computer systemExpiredDec 12, 86Jul 10, 90[G06F]
4847829 Video conferencing networkExpiredNov 25, 87Jul 11, 89[H04Q]
4785394 Fair arbitration technique for a split transaction bus in a multiprocessor computer systemExpiredSep 19, 86Nov 15, 88[G06F]
4783730 Input/output control technique utilizing multilevel memory structure for processor and I/O communicationExpiredSep 19, 86Nov 08, 88[G06F]
4716585 Gain switched audio conferencing networkExpiredApr 05, 85Dec 29, 87[H04M]
4710917 Video conferencing networkExpiredApr 08, 85Dec 01, 87[H04Q]
4686698 Workstation for interfacing with a video conferencing networkExpiredApr 08, 85Aug 11, 87[H04N]
4574227 Dual mode servoExpiredNov 14, 83Mar 04, 86[G05B]
4562481 Overlay for cathode ray tube displayExpiredSep 30, 82Dec 31, 85[H04N]
4470356 Word processor-controlled printer output bin lock boxExpiredFeb 09, 82Sep 11, 84[E05G]
4437660 Word processor--controlled printer output scanner mechanismExpiredNov 16, 81Mar 20, 84[B65H]

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