Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6003309 | Diagnostic apparatus for exhaust gas clarification apparatus for internal combustion engine | Akihito Numata, Eisaku Fukuchi, Yutaka Takaku, Toshio Ishii | 1999-12-21 |
| 5758491 | Diagnosing system and method of catalytic converter for controlling exhaust gas of internal combustion engine | Akihito Numata, Kazuya Kawano, Yutaka Takaku, Toshio Ishii | 1998-06-02 |
| 5740676 | Diagnostic apparatus for exhaust gas clarification apparatus for internal combustion engine | Akihito Numata, Eisaku Fukuchi, Yutaka Takaku, Toshio Ishii | 1998-04-21 |
| 5560199 | Malfunction monitoring apparatus and method for secondary air supply system of internal combustion engine | Toshio Ishii, Yuichi Kashimura | 1996-10-01 |