Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7797829 | Oil ring, manufacturing method thereof, and piston structure using the oil ring | Masaki Yamada, Kuniyasu Ito, Masami Kawasaki, Tomoaki Abe | 2010-09-21 |
| 6691658 | Rotation prevention structure of a valve lifter for an internal combustion engine | Hideo Fujita | 2004-02-17 |
| 6481398 | High-low speed range switching type valve mechanism for internal combustion engine | — | 2002-11-19 |
| 5765531 | Multi-valve engine | Masaaki Yoshikawa | 1998-06-16 |
| 5718196 | Lubrication and camshaft control system for engine | Masaaki Yoshikawa, Hironao Takahashi | 1998-02-17 |