Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812494 | Stabilized styrene polymer | Shinichi Yachigo, Tamaki Ishii, Masakatsu Yoshimura, Yukoh Takahashi, Hiroki Yamamoto | 1989-03-14 |
| 4803250 | Rubber composition with bismaleimides | Yasuzi Takemoto | 1989-02-07 |