Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6029693 | Valve driving apparatus | Yoshiharu Sato, Akio Fukunaga | 2000-02-29 |
| 5797583 | Valve driving apparatus | Kiyoshi Murata, Takashi Komiya, Yoshiharu Sato, Akio Fukunaga | 1998-08-25 |
| 4673164 | Sealing mechanism for a ball valve | Kenichi Hayama | 1987-06-16 |
| 4228988 | Valve | Kazo Higashi, Akio Fukunaga | 1980-10-21 |
| 4226258 | Ball valve | — | 1980-10-07 |