Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5713072 | Cellular fraud deterrent system | Charles F. Marth, Kenneth D. Wruk, Zhu Shenzhong | 1998-01-27 |
| 5398276 | Cellular-system signal-strength analyzer | Joseph A. Schifferdecker | 1995-03-14 |
| 5289526 | Cellular system access monitor | Daryl Chymyck | 1994-02-22 |