Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4538413 | Particle removing system for an internal combustion engine | Motohiro Shinzawa, Motomi Arai, Shomatsu Roppongi, Yoji Hasegawa | 1985-09-03 |
| 4453379 | Exhaust gas recirculation system for an internal combustion engine | Yoshihisa Kawamura | 1984-06-12 |
| 4442808 | Combustion chamber for spark ignition internal combustion engine | Saburo Tsutsumi, Yutaka Matayoshi, Kazuya Kunii | 1984-04-17 |
| 4422431 | Exhaust gas recirculation system for internal combustion engine | Yoji Hasegawa | 1983-12-27 |