Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4676204 | Starting system of an internal combustion engine | Yoichi Iwakura, Hirofumi Tanaka, Jun Umehara | 1987-06-30 |
| 4644919 | Warming-up system of a car engine | Yoichi Iwakura, Jun Umehara | 1987-02-24 |