Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6374818 | Apparatus for determining a failure of an oxygen concentration sensor | Akihiro Shinjyo, Hiroshi Kitagawa | 2002-04-23 |
| 5036820 | Method of determining activation of an exhaust gas concentration sensor equipped with a heater | Sachito Fujimoto, Takeshi Fukuzawa | 1991-08-06 |