Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796204 | Oil degradation warning system | — | 1989-01-03 |
| 4398526 | Plasma ignition system for internal combustion engine | Kyugo Hamai, Yasuhiko Nakagawa, Meroji Nakai | 1983-08-16 |