Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4433107 | Polyisoprene rubber compositions | Yasumasa Takeuchi, Nobuo Tagata, Masaki Ogawa, Yasushi Hirata, Shigeru Tomihira | 1984-02-21 |
| 4397994 | High vinyl polybutadiene or styrene-butadiene copolymer | Yasumasa Takeuchi, Yoshito Yoshimura, Noboru Ohshima, Akira Tsuji | 1983-08-09 |
| 4367325 | Styrene-butadiene random copolymer and process for the production thereof | Yasumasa Takeuchi, Noboru Ohshima, Funio Tsutsumi | 1983-01-04 |