Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8171723 | Abnormality detection system and abnormality detection method for internal combustion engine | Hiroshi Sawada, Daisuke Shibata | 2012-05-08 |
| 8146353 | Exhaust purification device for internal combustion engine, and exhaust control device and exhaust control method for internal combustion engine | Norihisa Nakagawa | 2012-04-03 |
| 8132450 | Malfunction diagnosis device for exhaust gas purification system and malfunction diagnosis method therefor | Daisuke Shibata, Hiroshi Sawada, Kazuhiro Wakao, Keisuke Sano, Kimikazu Yoda | 2012-03-13 |
| 8122869 | Air-fuel ratio control system of a multi-cylinder internal combustion engine | Takahiko Fujiwara, Norihisa Nakagawa, Junichi Kako, Naoto Kato, Shuntaro Okazaki +1 more | 2012-02-28 |
| 7474956 | Air-fuel ratio control system of internal combustion engine | Norihisa Nakagawa, Takahiko Fujiwara, Junichi Kako, Naoto Kato, Shuntaro Okazaki | 2009-01-06 |