Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H118 | Synthesized sound telephone alerting means | Richard E. Waddell, Kenneth B. Woodard | 1986-09-02 |
| 4317964 | Off-hook/on-hook status check circuit | Peter O. Schuh | 1982-03-02 |