Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882933 | Accelerometer with integral bidirectional shock protection and controllable viscous damping | Phillip W. Barth | 1989-11-28 |
| 4861420 | Method of making a semiconductor transducer | James W. Knutti, Henry V. Allen, Carl R. Kowalski | 1989-08-29 |