Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887568 | Ceramic insert for defining precombustion chamber in cylinder head | Tooru Matsuura | 1989-12-19 |
| 4881500 | Poppet valve made of ceramics | Takio Kojima | 1989-11-21 |
| 4875442 | Ceramic rocker arm | Shigeaki Akao | 1989-10-24 |
| 4850095 | Method of forming crowned sliding surface in mechanical part | Shigeaki Akao, Masaya Ito | 1989-07-25 |
| 4841922 | Method of making a rocker arm | Mitsuyoshi Kawamura, Noboru Ishida, Masaya Ito | 1989-06-27 |
| 4841120 | Thermal head | Masamori Yagino, Yoshitomo Ito, Toshimitsu Takano, Wataru Ishikawa, Sadatoshi Kikuchi +1 more | 1989-06-20 |
| 4838218 | Ceramic valve supporting structure in use for internal combustion engine | Yasushi Sato, Shigeru Nagasaki, Junichi Kagawa, Mitsuyoshi Kawamura | 1989-06-13 |
| 4828009 | Method of manufacturing a complex body of sintered ceramic material and metal | Yoshinori Narita | 1989-05-09 |
| 4803766 | Mounting of ceramic tip on metal rocker arm | Shigeaki Akao, Takio Kojima | 1989-02-14 |