Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5633927 | Video copy protection process enhancement to introduce horizontal and vertical picture distortions | John O. Ryan | 1997-05-27 |
| 5625691 | Method and apparatus to defeat certain copy protection pulses within a video signal | — | 1997-04-29 |
| 5608799 | Method and apparatus for scrambling and descrambling of video signal with edge fill | John O. Ryan, James R. Holzgrafe, Peter Wonfor | 1997-03-04 |