Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4761807 | Electronic audio communications system with voice authentication features | Gordon H. Matthews, Thomas B. Tansil | 1988-08-02 |
| 4757525 | Electronic audio communications system with voice command features | Gordon H. Matthews, Thomas B. Tansil | 1988-07-12 |
| 4652700 | Electronic audio communications system with versatile user accessibility | Gordon H. Matthews, Thomas B. Tansil | 1987-03-24 |
| 4640991 | Electronic audio communications systems network | Gordon H. Matthews, Thomas B. Tansil | 1987-02-03 |
| 4602129 | Electronic audio communications system with versatile message delivery | Gordon H. Matthews, Thomas B. Tansil | 1986-07-22 |
| 4585906 | Electronic audio communication system with user controlled message address | Gordon H. Matthews, Thomas B. Tansil | 1986-04-29 |
| 4581486 | Electronic audio communications system with user accessible message groups | Gordon H. Matthews, Thomas B. Tansil | 1986-04-08 |
| 4580012 | Electronic audio communications system with automatic user access features | Gordon H. Matthews, Thomas B. Tansil | 1986-04-01 |
| 4371752 | Electronic audio communication system | Gordon H. Matthews, Thomas B. Tansil | 1983-02-01 |