Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5273009 | Silicon-nitride-inserted piston | Yukio Miyairi | 1993-12-28 |
| 5097807 | Combustion chamber for diesel engines | Hiroshi Oikawa, Naohisa Nakashima, Minoru Matsui | 1992-03-24 |
| 4953528 | Direct injection-type diesel engines | Hiroshi Oikawa, Naohisa Nakashima, Tadaaki Matsuhisa | 1990-09-04 |