Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9334975 | Residual pressure release valve | Kazuhiro Matsushita | 2016-05-10 |
| 9086701 | Pressure reducing apparatus | Naoki Iguma, Kenji Tsukamoto | 2015-07-21 |
| D700286 | Residual pressure exhaust valve | Kazuhiro Matsushita | 2014-02-25 |
| 8181933 | Pipe joint | Koji Katsuta | 2012-05-22 |
| D644298 | Pressure regulator | Naoki Iguma, Kenji Tsukamoto | 2011-08-30 |
| D644299 | Pressure regulator | Naoki Iguma, Kenji Tsukamoto | 2011-08-30 |
| D640153 | Pressure regulator | Naoki Iguma, Kenji Tsukamoto | 2011-06-21 |
| D640154 | Pressure regulator | Naoki Iguma, Kenji Tsukamoto | 2011-06-21 |
| D608424 | Socket for pipe joint | Koji Katsuta | 2010-01-19 |
| 6868868 | Manifold regulator apparatus | — | 2005-03-22 |
| 6820486 | Pressure gauge having mechanism for opening and closing transparent cover plate | — | 2004-11-23 |
| 6283146 | Pressure reducing valve with pressure gage in handle | — | 2001-09-04 |
| D416076 | Pressure reducing valve | — | 1999-11-02 |