Le Groupe Videotron Ltee.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5675647 Cable TV system using passwordsExpiredDec 08, 95Oct 07, 97[H04L]
5629868 Method of programming local controlExpiredFeb 07, 94May 13, 97[G08B]
5524001 Dynamic cable signal assemblyExpiredFeb 07, 94Jun 04, 96[H04L, H04N]
5497185 Remote control system for television audience data gatheringExpiredAug 17, 94Mar 05, 96[H04N, H04H]
5497420 Cable TV system using passwordsExpiredFeb 07, 94Mar 05, 96[H04L]
5373315 Television audience data gatheringExpiredMar 14, 94Dec 13, 94[H04H]
5146336 Sync control for video overlayExpiredSep 14, 90Sep 08, 92[H04N]
4623920 Cable network data transmission systemExpiredJan 20, 83Nov 18, 86[H04N]

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