Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864432 | Signal monitoring system with failsafe back-up capability | — | 1989-09-05 |
| 4835630 | Modular configurable communications recorder | — | 1989-05-30 |
| 4811131 | Method and apparatus for scanning and recovering information from a record medium | Willy M. Sander | 1989-03-07 |