Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831189 | Process for producing aromatic dicarboxylic acids | Shinichi Araki, Yoshio Sugita, Naoji Kurata | 1989-05-16 |
| 4829498 | Limited duration focusing in a vehicular disk player | Yoshio Aoyagi, Toshiyuki Kimura | 1989-05-09 |