Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4661371 | Method of producing an exhaust valve for diesel engine | Takemi Yamada, Masaaki Mizushina, Koji Toyota, Hiromi Okamoto | 1987-04-28 |
| 4556022 | Exhaust valve for diesel engine and production thereof | Takemi Yamada, Masaaki Mizushina, Koji Toyota, Hiromi Okamoto | 1985-12-03 |
| 4554897 | Exhaust valve for Diesel engine and production thereof | Takemi Yamada, Masaaki Mizushina, Koji Toyota, Hiromi Okamoto | 1985-11-26 |
| 4554898 | Exhaust valve for diesel engine and production thereof | Takemi Yamada, Masaaki Mizushina, Koji Toyota, Hiromi Okamoto | 1985-11-26 |
| 4530322 | Exhaust valve for diesel engine and production thereof | Takemi Yamada, Masaaki Mizushina, Koji Toyota, Hiromi Okamoto | 1985-07-23 |