Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9804059 | Turbo rotational frequency detection device | Hitoshi Nakano | 2017-10-31 |
| 6726218 | Compression piston ring for use in internal combustion engine | Hideo Negishi, Hideshi Hitosugi | 2004-04-27 |
| 6553957 | Combination of cylinder liner and piston ring of internal combustion engine | Yoshiki Ishikawa, Yoshio Naito, Takashi Takakura, Kousuke Ito, Tatsuya Suzuki | 2003-04-29 |