Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5769603 | Submerged Pump | Tetsutaro Fujiwara, Seiichiro Yamada | 1998-06-23 |
| 5667362 | Pump system and method for operating the same | Yukio Murai | 1997-09-16 |
| 4592700 | Vortex pump | Makoto Kobayashi | 1986-06-03 |