Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7942119 | Variable valve mechanism | Akira Sugiura, Tamotsu Yamamoto | 2011-05-17 |
| 7673605 | Rocker arm and method of manufacturing same | Naoki Hiramatsu, Akira Takeuchi, Kimihiko Todo, Yoshio Kawatake | 2010-03-09 |
| 7621242 | Variable valve operating mechanism | Katsutoshi Kitagawa, Akira Sugiura, Tamotsu Yamamoto, Tetsuya Niwa | 2009-11-24 |
| 7451729 | Variable valve mechanism | Akira Sugiura, Tetsuya Niwa, Tamotsu Yamamoto, Katsutoshi Kitagawa, Tomoki Miyoshi | 2008-11-18 |
| 4644914 | Valve mechanism of internal combustion engine | Shuji Morita, Katsujiro Sato, Yoshio Asaoka, Isao Harada | 1987-02-24 |