Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817420 | Method and device for examination of a joint of a ultrasonic joint inspection device and method | Yoshiaki Fujita, Satoshi Kawai | 1989-04-04 |
| 4817063 | Power source control circuit for an analog electronic timepiece | — | 1989-03-28 |