| 7274790 |
Scrambling and descrambling a high definition TV signal |
John O. Ryan, Mark Hollar |
2007-09-25 |
| 6950520 |
Method and apparatus for carrying data in a video signal so that the data is not recorded |
John O. Ryan, Mark Hollar |
2005-09-27 |
| 6701062 |
Generational copy control of a video signal |
Johan Cornelis Talstra, Mark Hollar, Kordian Kurowski, David C. Collier, William J. Wrobleski +4 more |
2004-03-02 |
| 6594441 |
Method and apparatus for video tag signal recovery using various techniques to regenerate and re-record the tag signal |
— |
2003-07-15 |
| 6542609 |
Method and apparatus for scrambling a high definition television signal |
John O. Ryan, Mark Hollar |
2003-04-01 |
| 6374036 |
Method and apparatus for copy-once watermark for video recording |
John O. Ryan, Patrice Capitant, Clayton L. Davidson, Kordian Kurowski, Andrew Mellows +1 more |
2002-04-16 |
| 5844988 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
John O. Ryan |
1998-12-01 |
| 5841863 |
Method and apparatus for scrambling and descrambling of video signals with edge fill |
John O. Ryan |
1998-11-24 |
| 5608799 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
John O. Ryan, Ronald Quan, Peter Wonfor |
1997-03-04 |
| 5581307 |
Method and apparatus for scrambling and descrambling of video signals with edge fill |
John O. Ryan |
1996-12-03 |
| 5579390 |
Method and apparatus for vertically scrambling and descrambling of video signals |
John O. Ryan, Ronald Quan, Peter Wonfor |
1996-11-26 |
| 5504815 |
Method and apparatus for scrambling and descrambling |
John O. Ryan, Ronald Quan, Peter Wonfor |
1996-04-02 |
| 5438620 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
John O. Ryan, Ronald Quan, Peter Wonfor |
1995-08-01 |
| 4459614 |
Rotation-free electrical focussing circuit for television image tubes |
— |
1984-07-10 |
| 4337419 |
Analog geometry corrector for television camera image tubes |
— |
1982-06-29 |
| 4310855 |
Efficient multichannel automatic setup and remote control system |
— |
1982-01-12 |
| 4309723 |
Apparatus and method for registration and shading of color television cameras |
John O. Ryan, Joseph L. Corkery, Edward P. Sudyka, Gerow D. Brill, Anne M. Reagan |
1982-01-05 |