Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5145147 | Normally closed-type fluid control valve | Akira Nakazawa | 1992-09-08 |
| 5094430 | Control valve | Takashi Shirai, Michinori Iwamoto, Tetsuo Shimizu | 1992-03-10 |
| 4666126 | Control valve | Kiyoharu Tujimura | 1987-05-19 |