Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5634740 | Large-depth underground drainage facility and method of running same | Kunio Takada, Kenji Otani, Masayuki Yamada, Saburo Maru, Sumio Sudo | 1997-06-03 |
| 5603587 | Drainage water pumping station and method for operating the same | Kunio Takada, Kenji Otani | 1997-02-18 |
| 5595473 | Centrifugal fluid machine | Yoshihiro Nagaoka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki +2 more | 1997-01-21 |