Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877817 | Chlorinated rubber | Takashi Nakahara, Yasuhiko Otawa, Katsuo Okamoto | 1989-10-31 |
| 4818785 | Fine particulate crosslinked amorphous copolymer and preparation and use thereof | Yasuhiko Otawa, Akira Matsuda, Katsuo Okamoto | 1989-04-04 |
| 4814390 | Chlorinated rubber | Takashi Nakahara, Yasuhiko Otawa, Katsuo Okamoto | 1989-03-21 |