Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849478 | Oil-resistant rubber composition | Yoji Mori, Yoshiaki Kawamura, Hironori Matsumoto | 1989-07-18 |
| 4822654 | Novel vulcanizable rubber compositions and applications thereof | Shinichiro Zen, Yoshiaki Zama, Hiroji Enyo | 1989-04-18 |