Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6769422 | Apparatus and method for controlling air-fuel ratio of engine | — | 2004-08-03 |
| 6723965 | Heater control apparatus of air-fuel ratio sensor and method thereof | Hiroyuki Ohsaki | 2004-04-20 |
| 6712054 | Device and method for measuring element temperature of air-fuel ratio sensor, and device and method for controlling heater of air-fuel ratio sensor | Hajime Hosoya, Koji Takahashi | 2004-03-30 |