Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864856 | Liquid level detecting device | Koji Ichikawa, Norikazu Soga | 1989-09-12 |
| 4843471 | Video image storage device | Yoshiyuki Yazawa, Taizo Akimoto, Susumu Washizu, Tsuyoshi Shoji | 1989-06-27 |