Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5487646 | Vacuum pump control apparatus for an evacuating type waste water collecting system | Akihiro Ushitora, Kazuo Yamaguchi | 1996-01-30 |
| 5114280 | Vacuum type sewage collecting system and vacuum valve controller for the same | Akihiro Ushitora, Kazuo Yamaguchi | 1992-05-19 |
| 5100266 | Pipe connection structure and vacuum-type sewage collecting apparatus incorporating the pipe connection structure | Akihiro Ushitora, Kazuo Yamaguchi | 1992-03-31 |
| 5083885 | Laying structure for vacuum sewer pipe of vacuum sewage collecting system | Akihiro Ushitora, Kazuo Yamaguchi, Toshiyuki Hasegawa | 1992-01-28 |
| 5074718 | Vacuum-type sewage collecting apparatus | Akihiro Ushitora, Kazuo Yamaguchi | 1991-12-24 |