Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853524 | Optical identification card system | Masami Yamaguchi, Shunichi Ishikawa, Hirokazu Tanaka, Tomio Nakaya, Kiyomitsu Ishikawa | 1989-08-01 |
| 4833357 | Rotor for miniature motors | Hisashi Shibata | 1989-05-23 |