Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10968872 | Exhaust gas recirculation valve warming device | Koichi Nishitani | 2021-04-06 |
| 7510196 | Oil ring for internal combustion engine | Kazuhito Seki, Shiro Shibata | 2009-03-31 |
| 7354045 | Oil ring | Tomoaki Abe, Shiro Shibata, Hideshi Hitosugi | 2008-04-08 |
| 6772744 | PCV apparatus | Hitoki Nishino | 2004-08-10 |