Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873952 | Engine cylinder head with precombustion chambers using porous ceramics insert | Yoshinori Narita | 1989-10-17 |
| 4872431 | Internal combustion engine with ceramics valves | Shigeaki Akao, Noboru Ishida | 1989-10-10 |
| 4841922 | Method of making a rocker arm | Masato Taniguchi, Noboru Ishida, Masaya Ito | 1989-06-27 |
| 4838218 | Ceramic valve supporting structure in use for internal combustion engine | Yasushi Sato, Shigeru Nagasaki, Masato Taniguchi, Junichi Kagawa | 1989-06-13 |
| 4796517 | Metal piston and ceramic piston pin assembly | Shigeaki Akao, Takio Kojima | 1989-01-10 |
| 4796576 | Adjustment mechanism for ceramic rocker arm | Tooru Matsuura, Noboru Ishida | 1989-01-10 |