Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6516612 | Exhaust gas purification device for an engine and A/F ratio control for early activating a NOx trapping catalyst | Hirofumi Tsuchida, Keiji Okada, Kouji Ishihara | 2003-02-11 |