Assignee
COPYGUARD ENTERPRISES
LU·3 granted patents·11 citations·filing 1989–1995
Technology mixH04N3
Top patents by PatentIndex Score
3 records- 0137US5101275AVideo camera with automatic intensity controlCOPYGUARD ENTERPRISES·Filed 1989·Granted Mar 31, 1992·7 cites·6 claims
- 0230US5481608AMethod and an apparatus for preventing unauthorized copying of video signals on tapeCOPYGUARD ENTERPRISES·Filed 1994·Granted Jan 2, 1996·4 cites·17 claims
- 0324US5673356AMethod and an apparatus for preventing unauthorized recording on tapes on video programsCOPYGUARD ENTERPRISES·Filed 1995·Granted Sep 30, 1997·0 cites·28 claims
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