Inventor
James R. Holzgrafe
Inventor
Morgan Hill, CA, US
Overview
Patents· 17 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Nprimary
H04NPictorial communication, e.g. television89%
G06TImage data processing or generation, in general11%
PatentTitleYear
7,274,790'Scrambling and descrambling a high definition TV signal'20076,950,520'Method and apparatus for carrying data in a video signal so that the data is not recorded'20056,701,062'Generational copy control of a video signal'20046,594,441'Method and apparatus for video tag signal recovery using various techniques to regenerate and re-record the tag signal'20036,542,609'Method and apparatus for scrambling a high definition television signal'20036,374,036'Method and apparatus for copy-once watermark for video recording'20025,844,988'Method and apparatus for scrambling and descrambling of video signal with edge fill'19985,841,863'Method and apparatus for scrambling and descrambling of video signals with edge fill'19985,608,799'Method and apparatus for scrambling and descrambling of video signal with edge fill'19975,581,307'Method and apparatus for scrambling and descrambling of video signals with edge fill'19965,579,390'Method and apparatus for vertically scrambling and descrambling of video signals'19965,504,815'Method and apparatus for scrambling and descrambling'19965,438,620'Method and apparatus for scrambling and descrambling of video signal with edge fill'19954,459,614'Rotation-free electrical focussing circuit for television image tubes'19844,337,419'Analog geometry corrector for television camera image tubes'19824,310,855'Efficient multichannel automatic setup and remote control system'19824,309,723'Apparatus and method for registration and shading of color television cameras'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–1984Patents assigned to AMPEX (4)· patent assignee history
1982–1984Based in Sunnyvale, CA, US· patent location history
1995–2007Patents assigned to MACROVISION CORP (12)· patent assignee history
1995–2007Based in Morgan Hill, CA, US· patent location history
2002Patents assigned to DIGIMARC CORP (1)· patent assignee history
2002Patents assigned to MACROVSION CORP (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MACROVISION CORP | 12 | 1995–2007 |
| AMPEX | 4 | 1982–1984 |
| DIGIMARC CORP | 1 | 2002 |
| MACROVSION CORP | 1 | 2002 |
Locations
| Location | Patents | Span |
|---|---|---|
| Morgan Hill, California, US | 13 | 1995–2007 |
| Sunnyvale, California, US | 4 | 1982–1984 |