Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5553141 | Encryption and decryption (scrambling and unscrambling) of video signals | Keith Lucas | 1996-09-03 |
| 4651208 | Compatibility of widescreen and non-widescreen television transmissions | Charles W. Rhodes | 1987-03-17 |
| 4642688 | Method and apparatus for creating encrypted and decrypted television signals | Keith Lucas | 1987-02-10 |