Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6832594 | Direct fuel injection engine | Koji Hiraya | 2004-12-21 |
| 6739309 | Direct fuel injection internal combustion engine | Koji Hiraya, Akihiko Kakuho | 2004-05-25 |
| 6688293 | System and method for auto-ignition support | Koichi Yamaguchi, Kazuya Hasegawa, Koudai Yoshizawa | 2004-02-10 |
| 6672276 | Direct fuel injection engine | Koji Hiraya | 2004-01-06 |