TELECONFERENCING TECHNOLOGIES, INC., A DE CORP.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
D286403 Console for teleconference communicationExpiredDec 08, 83Oct 28, 86[]
D283891 Teleconferencing microphoneExpiredDec 08, 83May 20, 86[]
4436966 Conference microphone unitExpiredMar 15, 82Mar 13, 84[H04R]
4378468 Methods and apparatus for alleviating sound-coupled feedback in conference room sound systemsExpiredOct 10, 80Mar 29, 83[H04M]
4360827 Method and means for interactive audio and video conferencingExpiredJun 02, 81Nov 23, 82[H04N]

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