Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872738 | Acousto-optic fiber-optic frequency shifter using periodic contact with a surface acoustic wave | William P. Risk | 1989-10-10 |
| 4861975 | Variable focus optical system and method using electro-optic material | Timothy R. Corle | 1989-08-29 |