Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5076225 | Piston for an internal combustion engine | Roichi Shimura, Youichi Sugiura | 1991-12-31 |
| 4785774 | Piston for an internal combustion engine | — | 1988-11-22 |
| 4774917 | Piston and piston ring for an internal combustion engine | — | 1988-10-04 |
| 4409947 | Exhaust gas recirculating type diesel engine | Hiromichi Yanagihara | 1983-10-18 |