Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D450442 | Upholstery needle pusher | — | 2001-11-20 |
| 5394470 | Horizontal pulse augmentation of a video signal | William J. Buynak, Graham S. Stubbs, Karoly Budai | 1995-02-28 |
| 5034981 | Anti-copying video signal processing | Bill Perlman, Karoly Budai, William R. Dolson | 1991-07-23 |
| 5003590 | Encoding an optical video disc to inhibit video tape recording | Bernard J. Lechner, Graham S. Stubbs | 1991-03-26 |
| 4914694 | Modifying a television signal to inhibit recording/reproduction | Bill Perlman, Karoly Budai, William R. Dolson | 1990-04-03 |
| 4752676 | "Reliable secure, updatable ""cash"" card system" | Bill Perlman | 1988-06-21 |
| 4439785 | Subscriber television system | — | 1984-03-27 |