Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858574 | Hydraulic circuit for a valve operating timing control device for an internal combustion engine | Mitsuhiro Shibata, Toshiaki Hiro, Masahiko Matsumoto | 1989-08-22 |
| 4807574 | Valve operating device for internal combustion engine | Mitsuhiro Shibata, Kazuhide Kumagai, Toshiaki Hiro, Masahiko Matsumoto | 1989-02-28 |
| 4800850 | Hydraulic circuit for a valve operating mechanism for an internal combustion engine | Kazuo Yoshida | 1989-01-31 |