Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4502454 | Ignition system for an internal combustion engine | Kyugo Hamai, Ryusaburo Inoue, Yasuhiko Nakagawa | 1985-03-05 |
| 4497306 | Ignition system for an internal combustion engine | Kyugo Hamai, Yasuhiko Nakagawa, Ryusaburo Inoue | 1985-02-05 |
| 4475492 | System for forcefully igniting sprayed fuel of a diesel engine during engine starting | Junichi Furukawa, Yasuhiko Nakagawa, Kyugo Hamai | 1984-10-09 |
| 4457285 | Sustained arc ignition system for an internal combustion engine | Kyugo Hamai, Yasuhiko Nakagawa, Junichi Furukawa, Takashi Ishizuka | 1984-07-03 |
| 4442821 | Internal combustion engine ignition method | Kyugo Hamai, Yasuhiko Nakagawa, Ryuzaburo Inoue | 1984-04-17 |
| 4419601 | Spark plug for internal combustion engine | Kyugo Hamai, Yasuhiko Nakagawa, Ryuzaburo Maruyama | 1983-12-06 |
| 4398526 | Plasma ignition system for internal combustion engine | Kyugo Hamai, Yasuhiko Nakagawa, Ryuzaburou Inoue | 1983-08-16 |
| 4354136 | Ignition plug for internal combustion engine | Kyugo Hamai, Ryuzaburo Maruyama, Yasuhiko Nakagawa | 1982-10-12 |
| 4271795 | Internal combustion engine with dual induction system and with fuel injection system to discharge fuel into secondary induction system | Yasuhiko Nakagawa, Yukihiro Etoh, Ryoji Nakajima | 1981-06-09 |
| 4270500 | Internal combustion engine with dual induction system | Yasuhiko Nakagawa, Yukihiro Etoh, Ryoji Nakajima | 1981-06-02 |
| 4246874 | Internal combustion engine with dual induction system and with fuel injection system to discharge fuel into primary induction system | Yasuhiko Nakagawa, Yukihiro Etoh, Ryoji Nakajima | 1981-01-27 |