Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6438945 | Evaporated fuel treatment device of an engine | Naoya Takagi, Yoshihiko Hyodo | 2002-08-27 |
| 6293246 | Spark-assist type self-ignition engine | Toshio Tanahashi, Yushiro Yasuda, Toshiaki Asada | 2001-09-25 |
| 6257218 | Fuel vapor feed controlling apparatus for a lean burn type internal combustion engine | Naoya Takagi, Yoshihiko Hyodo, Zenichiro Mashiki, Tetsuji Nagata | 2001-07-10 |
| 6253743 | Fuel vapor control apparatus | Yoshihiko Hyodo, Hidekazu Sasaki, Koichi Takeuchi | 2001-07-03 |
| 6145306 | Exhaust gas purifying of lean-burn internal combustion engine | Naoya Takagi, Yoshihiko Hyodo | 2000-11-14 |
| 6102003 | Apparatus for detecting concentration of fuel vapor in lean-burn internal combustion engine, and applied apparatus thereof | Yoshihiko Hyodo, Naoya Takagi | 2000-08-15 |
| 6044831 | Fuel vapor feed controlling apparatus for lean burn type internal combustion engine | Naoya Takagi, Yoshihiko Hyodo, Zenichiro Mashiki, Tetsuji Nagata | 2000-04-04 |
| 4697567 | Air-fuel ratio control system of internal combustion engine | Hiroshi Sawada | 1987-10-06 |
| 4522180 | Air-fuel ratio control apparatus | Hiroki Matsuoka | 1985-06-11 |