Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858581 | Air-fuel ratio feedback control method for internal combustion engines | Shuichi Hosoi | 1989-08-22 |
| 4848303 | Method of controlling operation of internal combustion engines | Makoto Hashiguchi | 1989-07-18 |
| 4796589 | Air-fuel ratio feedback control method for internal combustion engines | Kazunari Yamashita | 1989-01-10 |