Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7620178 | Copy protection for video signal added pulses | Peter Wonfor, Alistair Knox, John O. Ryan, Ronald Quan | 2009-11-17 |
| 5583936 | Video copy protection process enhancement to introduce horizontal and vertical picture distortions | Peter Wonfor, Alistair Knox, John O. Ryan, Ronald Quan | 1996-12-10 |