Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6397586 | Emission control apparatus and method of internal combustion engine | Takashi Watanabe | 2002-06-04 |
| 6370872 | Exhaust gas purifier for internal combustion engine | Takashi Watanabe, Koichi Hoshi | 2002-04-16 |