Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864995 | System for controlling ignition timing in internal combustion engine | Jiro Sumitani | 1989-09-12 |
| 4854285 | Electronic control circuit for internal-combustion engines | Ryoji Nishiyama | 1989-08-08 |
| 4848301 | Fuel feed quantity control system for internal combustion engine | Toru Hashimoto, Akira Takahashi, Mamoru Sugiura, Hiroshi Takamatsu, Takeshi Jinbo +1 more | 1989-07-18 |
| 4809664 | Fuel controlling system for internal combustion engine | Katsuya Nakamoto, Ryoji Nishiyama | 1989-03-07 |
| 4805577 | Fuel supply control apparatus for internal combustion engine | Katsuya Nakamoto, Jiro Sumitani | 1989-02-21 |