Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885322 | Novel ammonium salt useful as modifiers for rubber | Hiroki Yamamoto, Tetsuo Yamaguchi | 1989-12-05 |
| 4866101 | Rubber composition for producing sponge rubber product | Tadanobu Iwasa, Masataka Sasayama, Masaki Ohashi | 1989-09-12 |