Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7950911 | Single stage root type-vacuum pump and vacuum fluid transport system employing the single stage root type-vacuum pump | Yosinobu Ito | 2011-05-31 |
| 6298870 | Vacuum-operated sewage system and air inlet valve | Tomohiro Nakamura | 2001-10-09 |
| 5918853 | Vacuum valve control device and vacuum valve | Yasuo Yamabe | 1999-07-06 |
| 5615701 | Vacuum valve control device and vacuum valve | Yasuo Yamabe | 1997-04-01 |