Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5010137 | Rubber composition, and oil seal and rubber hose obtained therefrom | Itsuki Umeda, Masaaki Takashima, Yoshiaki Zama, Yasuhiko Takemura, Junichiro Watanabe +2 more | 1991-04-23 |
| 4942202 | Rubber composition and vulcanized rubber product | Yoshiaki Zama, Itsuki Umeda, Yasuhiko Takemura, Masaaki Takashima, Junichiro Watanabe +2 more | 1990-07-17 |