Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840932 | Catalyst for producing 1,4-naphthoquinone | Ryo Matsuura, Shigeyuki Yoshimura, Katsuaki Nasu, Haruo Yoshizumi, Kazumi Tsujimoto +1 more | 1989-06-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840932 | Catalyst for producing 1,4-naphthoquinone | Ryo Matsuura, Shigeyuki Yoshimura, Katsuaki Nasu, Haruo Yoshizumi, Kazumi Tsujimoto +1 more | 1989-06-20 |