Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6230489 | Emission control device for internal combustion engine | Kimiyoshi Nishizawa, Ritsuo Sato, Naoki Kachi | 2001-05-15 |
| 6220018 | Exhaust emission control device | Fuminori Yamanashi, Kimiyoshi Nishizawa, Ritsuo Sato | 2001-04-24 |
| 6185933 | Exhaust emission control device for engine | Ritsuo Sato, Kimiyoshi Nishizawa | 2001-02-13 |
| 5191739 | Method and apparatus for lapping gear teeth while changing at least one of load torque, rotating speeds and rate of teeth contact point movement of the gears | Norihiko KONDO, Yoshinori Miura | 1993-03-09 |