Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837475 | Crystal resonator with low acceleration sensitivity and method of manufacture thereof | Errol P. EerNisse | 1989-06-06 |
| 4802370 | Transducer and sensor apparatus and method | Errol P. EerNisse | 1989-02-07 |