Inventor
OKADA RYOJI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “OKADA RYOJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
12 patentsUS5458460AOct 17, 1995
Drainage pump and a hydraulic turbine incorporating a bearing member, and a method of manufacturing the bearing member
HITACHI LTD23 citations92
US5180001AJan 19, 1993
Heat transfer member
HITACHI LTD40 citations92
US4855102AAug 8, 1989
Sintering method
HITACHI LTD31 citations92
US4610718ASep 9, 1986
Method for manufacturing ultra-fine particles
HITACHI LTD49 citations92
US5346316ASep 13, 1994
Bearing unit, drainage pump and hydraulic turbine each incorporating the bearing unit
HITACHI LTD29 citations91
US5839880ANov 24, 1998
Bearing unit, drainage pump and hydraulic turbine each incorporating the bearing unit, and method of manufacturing the bearing unit
HITACHI LTD16 citations81
US5301078AApr 5, 1994
Magnetic disk unit and manufacturing method of carriage structure thereof
HITACHI LTD17 citations73
US5297927AMar 29, 1994
Vertical shaft type pump
HITACHI LTD6 citations73
US5168097ADec 1, 1992
Laser deposition process for forming an ultrafine-particle film
HITACHI LTD18 citations73
US7400568B2Jul 15, 2008
Optical device, optical pickup and optical disk apparatus
HITACHI LTD8 citations71
US5938403AAug 17, 1999
Runner, water wheel and method of manufacturing the same
HITACHI LTD16 citations68
US7298972B2Nov 20, 2007
Optical switch and a control method thereof
HITACHI LTD2 citations62