Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876739 | TVRO receiver system with low-cost video-noise reduction filter | John Y. Ma | 1989-10-24 |
| 4801940 | Satellite seeking system for earth-station antennas for TVRO systems | John Y. Ma, David H. McCracken, Steven A. Weiss | 1989-01-31 |