Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890158 | Recursive noise reduction filter for video test apparatus | Daniel G. Baker, William J. Cooper | 1989-12-26 |
| 4829366 | Method and apparatus for measuring delay and/or gain difference using two different frequency sources | — | 1989-05-09 |