Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5142534 | Wireless integrated voice-data communication system | Raymond W. Simpson, Richard Zaffino, Sorin Davidovici | 1992-08-25 |
| 4797915 | Communication system having automatic call route selection | Duane O. Bowker, David F. Jones | 1989-01-10 |
| 4665545 | Communication system having multi-mode line selection buttons | Duane Galensky | 1987-05-12 |