Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304456 | Paper hole drill | — | 1989-11-07 |
| 4820264 | Infusion instrument | Mizuo Matsui, Fumio Ohtomo, Koji Sato | 1989-04-11 |
| 4806751 | Code wheel for a reflective type optical rotary encoder | Hiraku Abe, Yoji Shimojima | 1989-02-21 |