Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859877 | Bidirectional digital signal transmission system | Michael Cooperman | 1989-08-22 |
| 4818988 | Crosspoint switching array | Michael Cooperman | 1989-04-04 |
| 4807258 | Method for synchronizing a digital communication system | David A. Perreault, Arnold Paige | 1989-02-21 |
| 4805196 | Line delay compensation for digital transmission systems utilizing low power line drivers | Michael Cooperman | 1989-02-14 |