Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881428 | Throttle valve control apparatus for internal combustion engine | Kouji Yamaguchi, Kouji Sasajima | 1989-11-21 |
| 4860708 | Throttle control system for automotive internal combustion engine | Kouji Yamaguchi, Toshihiro Kameda, Shogo Hattori, Junichi Miyake | 1989-08-29 |
| 4856417 | Trunk piston for use in an internal combustion engine | — | 1989-08-15 |
| 4799467 | Throttle valve control system for an internal combustion engine | Kouji Yamaguchi | 1989-01-24 |