Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889098 | Air-fuel ratio detecting apparatus for an internal combustion engine equipped with a heater controller | Ryoji Nishiyama, Shinichi Nishida | 1989-12-26 |
| 4886028 | Apparatus for controlling air-fuel ratio of internal combustion engine | Masanobu Uchinami, Toshihisa Takahashi, Ryoji Nishiyama, Shinichi Nishida | 1989-12-12 |
| 4794903 | Recirculated exhaust gas quantity control apparatus for internal combustion engine | — | 1989-01-03 |