Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6497846 | Exhaust gas purifying system for internal combustion engine | Keiji Okada, Kazuhiko Kanetoshi, Hirofumi Tsuchida | 2002-12-24 |
| 6477833 | Engine exhaust emission control | Hirofumi Tsuchida, Toshikazu Shiino, Kaname Naganuma | 2002-11-12 |
| 6381954 | Air/fuel ratio control system of internal combustion engine | Masatomo Kakuyama, Hirofumi Tsuchida, Osamu Matsuno | 2002-05-07 |