Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882751 | Secure trunked communications system | Michael D. Kotzin, Eric F. Ziolko | 1989-11-21 |
| 4870408 | Method for dynamically allocating data channels on a trunked communication system | Garry C. Hess, Richard A. Comroe | 1989-09-26 |
| 4837858 | Subscriber unit for a trunked voice/data communication system | Sewim F. Ablay, Stuart W. Thro | 1989-06-06 |
| 4833701 | Trunked communication system with nationwide roaming capability | Richard A. Comroe | 1989-05-23 |
| 4817190 | Method for dynamically regrouping subscribers on a communications system | Richard A. Comroe, John E. Major, Daniel J. Coombes, Susan M. Whitney, Michael D. Sasuta +4 more | 1989-03-28 |