Inventor · disambiguated record
James R. Holzgrafe
Also filed as: HOLZGRAFE JAMES · HOLZGRAFE JAMES R · QUAN RONALD
17 granted patents·541 citations·filing 1980–2003
95Inventor score
Top patents by PatentIndex Score
17 records- 0193US6374036B1Method and apparatus for copy-once watermark for video recordingMACROVSION CORP·Filed 1998·Granted Apr 16, 2002·265 cites·57 claims
- 0287US6542609B1Method and apparatus for scrambling a high definition television signalMACROVISION CORP·Filed 2000·Granted Apr 1, 2003·33 cites·25 claims
- 0382US6950520B1Method and apparatus for carrying data in a video signal so that the data is not recordedMACROVISION CORP·Filed 2000·Granted Sep 27, 2005·22 cites·12 claims
- 0477US5504815AMethod and apparatus for scrambling and descramblingMACROVISION CORP·Filed 1995·Granted Apr 2, 1996·36 cites·6 claims
- 0573US5844988AMethod and apparatus for scrambling and descrambling of video signal with edge fillMACROVISION CORP·Filed 1995·Granted Dec 1, 1998·28 cites·10 claims
- 0673US5438620AMethod and apparatus for scrambling and descrambling of video signal with edge fillMACROVISION CORP·Filed 1994·Granted Aug 1, 1995·21 cites·12 claims
- 0772US6701062B1Generational copy control of a video signalMACROVISION CORP·Filed 1999·Granted Mar 2, 2004·53 cites·17 claims
- 0870US5608799AMethod and apparatus for scrambling and descrambling of video signal with edge fillMACROVISION CORP·Filed 1995·Granted Mar 4, 1997·24 cites·5 claims
- 0965US5841863AMethod and apparatus for scrambling and descrambling of video signals with edge fillMACROVISION CORP·Filed 1995·Granted Nov 24, 1998·18 cites·7 claims
- 1064US5579390AMethod and apparatus for vertically scrambling and descrambling of video signalsMACROVISION CORP·Filed 1995·Granted Nov 26, 1996·17 cites·5 claims
- 1157US7274790B2Scrambling and descrambling a high definition TV signalMACROVISION CORP·Filed 2003·Granted Sep 25, 2007·2 cites·61 claims
- 1241US6594441B1Method and apparatus for video tag signal recovery using various techniques to regenerate and re-record the tag signalMACROVISION CORP·Filed 1999·Granted Jul 15, 2003·8 cites·51 claims
- 1338US5581307AMethod and apparatus for scrambling and descrambling of video signals with edge fillMACROVISION CORP·Filed 1995·Granted Dec 3, 1996·3 cites·4 claims
- 1435US4310855AEfficient multichannel automatic setup and remote control systemAMPEX·Filed 1980·Granted Jan 12, 1982·4 cites·11 claims
- 1531US4459614ARotation-free electrical focussing circuit for television image tubesAMPEX·Filed 1981·Granted Jul 10, 1984·2 cites·10 claims
- 1631US4337419AAnalog geometry corrector for television camera image tubesAMPEX·Filed 1980·Granted Jun 29, 1982·2 cites·10 claims
- 1728US4309723AApparatus and method for registration and shading of color television camerasAMPEX·Filed 1980·Granted Jan 5, 1982·3 cites·19 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →