Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4682224 | System, method, and apparatus for television signal scrambling and descrambling | Clinton S. Hatmann, Darrell L. Ash | 1987-07-21 |
| 4663664 | Electronic ticket method and apparatus for television signal scrambling and descrambling | Clinton S. Hartmann, Darrell L. Ash | 1987-05-05 |
| 4513260 | Programmable frequency converting filter | — | 1985-04-23 |
| 4403252 | Television scrambling and unscrambling method and apparatus | Clinton S. Hartmann | 1983-09-06 |