Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872431 | Internal combustion engine with ceramics valves | Shigeaki Akao, Mitsuyoshi Kawamura | 1989-10-10 |
| 4841922 | Method of making a rocker arm | Masato Taniguchi, Mitsuyoshi Kawamura, Masaya Ito | 1989-06-27 |
| 4796576 | Adjustment mechanism for ceramic rocker arm | Tooru Matsuura, Mitsuyoshi Kawamura | 1989-01-10 |