Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6600998 | Catalyst deteriorating state detecting apparatus | Yoshihiro Majima, Yukihiro Yamashita | 2003-07-29 |
| 6539707 | Exhaust emission control system for internal combustion engine | Yukihiro Yamashita, Hisashi Iida, Kouichi Shimizu | 2003-04-01 |
| 6530214 | Air-fuel ratio control apparatus having sub-feedback control | Hisashi Iida, Kouichi Shimizu | 2003-03-11 |