Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4715062 | Speakerphone control circuit having low gain states and method for controlling gain of speakerphone | Vincent V. Korsky | 1987-12-22 |
| 4381501 | Encoding apparatus utilizing acoustic waves of controlled initial polarity | Pedro T. Guzman | 1983-04-26 |