Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845772 | Portable radiotelephone with control switch disabling | Scott Davis, P. J. Gargulak | 1989-07-04 |
| 4798975 | High noise immunity input level detector with hysteresis | Thomas J. Walczak | 1989-01-17 |