Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6636797 | Enhanced multiple injection for auto-ignition in internal combustion engines | Koudai Yoshizawa, Hiroshi Miyakubo, Koji Hiraya | 2003-10-21 |
| 6612294 | Auto-ignition of gasoline engine by varying exhaust gas retaining duration | Koji Hiraya, Hiroshi Miyakubo | 2003-09-02 |