Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868892 | Tuning system with provisions for calculating the local oscillator frequency from an aft characteristic | William John Testin, Mark Francis Rumreich | 1989-09-19 |
| 4823387 | Television tuning system with provisions for tuning RF signals with scrambled video information | — | 1989-04-18 |