Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4928641 | Lubricant supplying system for DOHC type multi-cylinder internal combustion engine | Tomonori Niizato, Kazuhiro Kasahara, Tsutomu Saka, Toshihiro Oikawa | 1990-05-29 |
| 4911112 | Valve operating system for internal combustion engines | Toshihiro Oikawa, Noriyuki Yamada, Toshiki Kobayashi, Tsutomu Saka | 1990-03-27 |
| 4883027 | Valve operating system for internal combustion engines | Toshihiro Oikawa, Noriyuki Yamada, Tsutomu Saka, Toshiki Kobayashi | 1989-11-28 |
| 4579091 | Cylinder head for internal combustion engines | Yoshio Kashiwagi | 1986-04-01 |