Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741049 | Automatic channel selecting system using shared duplex channels | Johan B. De Jager | 1988-04-26 |
| 4288868 | Satellite communication system for speech and telegraphy | Hermanus H. Grotjohann | 1981-09-08 |