Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825007 | Oxidation process of aromatic compounds | Yutaka Konai, Kazuo Yoshida | 1989-04-25 |
| 4808989 | Display control apparatus | Kuniaki Tabata, Tetsuo Machida, Kunihiro Nomura | 1989-02-28 |