Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6053703 | Control method for displacement-type fluid machine, and apparatus thereof | Kyoji Kawaguchi | 2000-04-25 |
| 5871027 | Vacuum valve controller | Osamu Shimizu | 1999-02-16 |
| 5588458 | Vacuum valve controller for vacuum sewer system | Osamu Shimizu | 1996-12-31 |
| 5575454 | Vacuum valve | Osamu Shimizu | 1996-11-19 |
| 5487646 | Vacuum pump control apparatus for an evacuating type waste water collecting system | Kazuo Yamaguchi, Tsuneo Asanagi | 1996-01-30 |
| 5292104 | Vacuum interface valve | Yoshiharu Takahashi | 1994-03-08 |
| 5114280 | Vacuum type sewage collecting system and vacuum valve controller for the same | Kazuo Yamaguchi, Tsuneo Asanagi | 1992-05-19 |
| 5100266 | Pipe connection structure and vacuum-type sewage collecting apparatus incorporating the pipe connection structure | Kazuo Yamaguchi, Tsuneo Asanagi | 1992-03-31 |
| 5083885 | Laying structure for vacuum sewer pipe of vacuum sewage collecting system | Kazuo Yamaguchi, Toshiyuki Hasegawa, Tsuneo Asanagi | 1992-01-28 |
| 5074718 | Vacuum-type sewage collecting apparatus | Kazuo Yamaguchi, Tsuneo Asanagi | 1991-12-24 |