Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5031230 | Frequency, phase and modulation control system which is especially useful in simulcast transmission systems | Joel E. Sandahl, Michael O'Brien | 1991-07-09 |
| 4525685 | Disciplined oscillator system with frequency control and accumulated time control | Robert J. Hesselberth, Joel E. Sandahl | 1985-06-25 |