Inventor
MARU SABURO
JP7 patents
Patents
7 patentsUS5360290ANov 1, 1994
Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump
HITACHI LTD44 citations95
US6102618AAug 15, 2000
Large-depth underground drainage facility and method of running same
HITACHI LTD38 citations92
US5909982AJun 8, 1999
Large-depth underground drainage facility and method of running same
HITACHI LTD35 citations92
US5487621AJan 30, 1996
Large-depth underground drainage facility and method of running same
HITACHI LTD39 citations92
US5634740AJun 3, 1997
Large-depth underground drainage facility and method of running same
HITACHI LTD5 citations73
US5624226AApr 29, 1997
Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump
HITACHI LTD10 citations73
US5733065AMar 31, 1998
Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump
HITACHI LTD3 citations62