Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6561484 | Gate valve | Masaharu Nakagawa, Hiroshi Minamoto, Manabu Yabe, Yuuzou Hayashi | 2003-05-13 |
| 6082706 | Non-sliding vacuum gate valve | — | 2000-07-04 |
| 5087017 | Valve body for non-sliding type gate valve | Toshio Sawa, Yuzo Hayashi | 1992-02-11 |
| 5002255 | Non-sliding gate valve for high vacuum use | Toshio Sawa, Yuzo Hayashi, Toshiro Katagiri | 1991-03-26 |