Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5809952 | Valve opening system of internal combustion engine | Takashi Ono, Akira Matsumoto, Masahiko Takeuchi | 1998-09-22 |
| 5803038 | Dynamic valve mechanism for engine | Tadato Ihara, Toshihiro Kokubun, Mitsunori Murakami | 1998-09-08 |