Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8607545 | Air-fuel ratio control device | Yoshiyuki Ootake, Masaki Koga | 2013-12-17 |
| 8176728 | Air-fuel ratio control device | Yoshiyuki Ootake, Masaki Koga | 2012-05-15 |
| 8141343 | Air-fuel ratio control apparatus | Hiroyuki Nagai, Yoshiyuki Ootake, Masaki Koga | 2012-03-27 |
| 7536999 | Air-fuel ratio control apparatus | Yoshiyuki Ootake, Masaki Koga, Kenichi Sato | 2009-05-26 |
| 7121086 | Desulphating of nitrogen oxide trapping catalyst | Satoshi Nishii, Kenichi Sato | 2006-10-17 |
| 6766640 | Engine exhaust purification device | Hideaki Takahashi, Yoshiaki Yoshioka | 2004-07-27 |
| 6263666 | Exhaust emission control device for internal combustion engine | Kengo Kubo, Kimiyoshi Nishizawa | 2001-07-24 |
| 6185929 | Exhaust emission control system for internal combustion engine | Kimiyoshi Nishizawa | 2001-02-13 |
| 6116023 | Internal combustion engine with NOx absorbent catalyst | Kimiyoshi Nishizawa | 2000-09-12 |
| 6101809 | Exhaust gas purifying system of internal combustion engine | Kimiyoshi Nishizawa | 2000-08-15 |
| 6050086 | Exhaust emission control apparatus for internal combustion engine | Takashi Yamada | 2000-04-18 |