Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7188589 | Direct injection internal combustion engine | Hirofumi Tsuchida, Koji Hiraya, Yutaka Matayoshi | 2007-03-13 |
| 7121087 | Exhaust emission control device of internal combustion engine | Isamu Hotta, Toshikazu Shiino, Hirofumi Tsuchida | 2006-10-17 |
| 6912989 | Fuel injection control device for a direct fuel injection engine | Hirofumi Tsuchida, Toshikazu Shiino, Taisuke Shiraishi, Koji Hiraya | 2005-07-05 |
| 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 |
| 6314724 | Air-fuel ratio controller and method of controlling air-fuel ratio | Masatomo Kakuyama, Hirofumi Tsuchida, Shigeaki Kakizaki | 2001-11-13 |
| 6289673 | Air-fuel ratio control for exhaust gas purification of engine | Hirofumi Tsuchida, Kazuhiko Kanetoshi, Keiji Okada | 2001-09-18 |
| 6282889 | Air/fuel ration control system of internal combustion engine | Masatomo Kakuyama, Hirofumi Tsuchida, Osamu Matsuno | 2001-09-04 |
| 6220017 | Exhaust emission control system for internal combustion engine | Toshikazu Shiino, Hirofumi Tsuchida, Keiji Okada | 2001-04-24 |