Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4944266 | Direct-injection diesel engine | Shumpei Hasegawa, Yasushi Takahashi | 1990-07-31 |
| 4696224 | Piston for internal combustion engine | — | 1987-09-29 |
| 4572141 | Method of controlling intake air quantity for internal combustion engines | Shumpei Hasegawa, Noriyuki Kishi, Yuzi Makino | 1986-02-25 |