Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866981 | Apparatus for detecting throttle valve opening of engine | Osamu Matsumoto, Mamoru Sumida | 1989-09-19 |
| 4815317 | Idling mode detecting switch for an internal-combustion engine | Osamu Matsumoto, Hichiro Otani, Yutaka Okaue | 1989-03-28 |