Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5239579 | Adaptive amplifier circuit | — | 1993-08-24 |
| 5170430 | Voice-switched handset receive amplifier | — | 1992-12-08 |
| 4317964 | Off-hook/on-hook status check circuit | Ronald D. Biggs | 1982-03-02 |