Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4739740 | Internal combustion engine air-fuel ratio feedback control method functioning to compensate for aging change in output characteristic of exhaust gas concentration sensor | Kenichi Ohkawara, Takeo Kiuchi, Eitetsu Akiyama | 1988-04-26 |
| 4617900 | Air-fuel ratio control system for an internal combustion engine having a control characteristic varying with the engine load | Hideo Kobayashi | 1986-10-21 |
| 4617891 | Secondary air supply for internal combustion engine | Shumpei Hasegawa | 1986-10-21 |
| 4586481 | Secondary air supply for internal combustion engine | Shumpei Hasegawa | 1986-05-06 |
| 4579099 | Air intake side secondary air supply system for an internal combustion engine | Yoshinobu Isobe, Hiroaki Iwasaki | 1986-04-01 |
| 4567873 | Air intake side secondary air supply system for an internal combustion engine | Yoshinobu Isobe, Hiroaki Iwasaki | 1986-02-04 |
| 4563990 | Fuel supply control system for engine carburetors | Hideo Kobayashi, Hidekazu Kano | 1986-01-14 |
| 4561394 | Air intake side secondary air supply system for an internal combustion engine | Masahiko Asakura | 1985-12-31 |
| 4553521 | Intake secondary air supply system for internal combustion engines | Yoshinobu Isobe, Fumio Hara, Shumpei Hasegawa | 1985-11-19 |
| 4526148 | Air-fuel ratio control system for an internal combustion engine | Shin Narasaka, Kazuo Otsuka | 1985-07-02 |
| 4484441 | Exhaust gas purification apparatus | Hideo Kobayashi, Yohji Fukutomi, Masahiko Asakura | 1984-11-27 |
| 4478199 | Method of controlling exhaust-gas recirculation in internal combustion engine | Shin Narasaka, Kazuo Otsuka | 1984-10-23 |