Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4421081 | Spark-ignition internal combustion engine | Ken Nakamura, Tadashi Nagai | 1983-12-20 |
| 4240253 | Engine system for motor vehicle | Ken Nakamura, Yasuo Nakajima, Kunihiko Sugihara | 1980-12-23 |