Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882388 | Rubber composition | Sigelu Yagisita, Masahiro Fukuyama | 1989-11-21 |
| 4828923 | Rubber laminates of fluororubber and nitrile rubber | Osamu Sugimoto | 1989-05-09 |
| 4814520 | Process for producing 2,2-bis(4'hydroxyphenyl) propanes | — | 1989-03-21 |