Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881162 | Frequency control system | — | 1989-11-14 |
| 4808854 | Trinary inverter | — | 1989-02-28 |
| 4801923 | Method and apparatus for digital TACAN output conversion | Robert Schwartz | 1989-01-31 |