Assignee
MACROVISION
US·5 granted patents·1 pending application·538 citations·filing 1983–2005
Top patents by PatentIndex Score
6 records- 0197US4631603AMethod and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereofMACROVISION·Filed 1985·Granted Dec 23, 1986·209 cites·20 claims
- 0296US4577216AMethod and apparatus for modifying the color burst to prohibit videotape recordingMACROVISION·Filed 1983·Granted Mar 18, 1986·115 cites·14 claims
- 0395US4937679ADual deck video recording apparatus having enhanced copy protection and method for providing enhanced copy protection to such a recording apparatusMACROVISION·Filed 1988·Granted Jun 26, 1990·65 cites·16 claims
- 0493US4695901AMethod and apparatus for removing pseudo-sync and/or agc pulses from a video signalMACROVISION·Filed 1986·Granted Sep 22, 1987·100 cites·31 claims
- 0589US4626890AMethod and apparatus for removing phase modulation from the color burstMACROVISION·Filed 1984·Granted Dec 2, 1986·49 cites·6 claims
- 0642US2007033395A1Method and system for hierarchical license serversMACROVISION·Filed 2005·Application pending·0 cites
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