Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6860485 | Piston ring | Nobuyuki Matsushima | 2005-03-01 |
| 6261389 | Synchronizer ring | Yoshikatsu Nakamura, Takao Omiya, Hiroshi Takiguchi | 2001-07-17 |
| 5900559 | Synchronizer ring | Yoshikatsu Nakamura | 1999-05-04 |
| 5861565 | Synchronizer ring | Takao Omiya, Kunihiro Iguchi | 1999-01-19 |
| 5092361 | Inline type check valve | Yasuo Suzuki | 1992-03-03 |
| 4740289 | Process for the hydrogenolysis of a coal liquid bottom | Yoichi Kageyama | 1988-04-26 |
| 4556751 | Catalytic isomerization process of dimethylnaphthalenes | Takao Maki, Yoshio Asahi | 1985-12-03 |
| 4478956 | Process for preparing bisphenols using pyridinealkanethiol derivatized sulphonated cation exchange resins | Takao Maki, Toshiharu Yokoyama, Yoshiko Fujiyama | 1984-10-23 |
| 4423252 | Process for preparing bisphenols | Takao Maki, Toshiharu Yokoyama, Yoshiko Fujiyama | 1983-12-27 |
| 4405823 | Process for the production of phenols | Takao Maki, Toshiharu Yokoyama | 1983-09-20 |