Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887561 | Method of controlling valve operation in an internal combustion engine | — | 1989-12-19 |
| 4876995 | Valve operation control device for internal combustion engine | Yutaka Otobe | 1989-10-31 |
| 4848086 | Boost pressure control method for a supercharged internal combustion engine | Kazuo Inoue, Osamu Kubota, Atsushi Katoh | 1989-07-18 |