Inventor
OMAE TSUTOMU
JP20 patents
⚠️ This page may combine multiple inventors who share the name “OMAE TSUTOMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
18 patentsUS5357181AOct 18, 1994
Failure detection method for electric vehicles and fail-safe control method using this method
HITACHI LTD123 citations98
US4772996ASep 20, 1988
Load current detecting device for pulse width modulation inverter
HITACHI LTD82 citations95
US4144992AMar 20, 1979
Method for controlling an automatic pipe welder
HITACHI LTD75 citations94
US4712052ADec 8, 1987
Digital servo-control system
HITACHI LTD26 citations93
US4311556AJan 19, 1982
Method and system for inspection of inside of nuclear reactor vessel
HITACHI LTD78 citations93
US4753309AJun 28, 1988
Electric power steering apparatus
HITACHI LTD40 citations92
US4163886AAug 7, 1979
Control apparatus for an automatic pipe welder
HITACHI LTD54 citations89
US4839834AJun 13, 1989
Speed detecting apparatus
HITACHI LTD29 citations88
US4366420ADec 28, 1982
Electromobile control device
HITACHI LTD21 citations82
US4580083AApr 1, 1986
Chopper controller for a D.C. motor
HITACHI LTD11 citations74
US4337509AJun 29, 1982
Method and apparatus for controlling firing phases of thyristors
HITACHI LTD7 citations74
US4211961AJul 8, 1980
Control circuit for use in control of current supply for electric motor with improved duty controlling oscillator circuit, particularly for electrical vehicle
HITACHI LTD18 citations74
US4960178AOct 2, 1990
Motor-driven power steering apparatus
HITACHI LTD10 citations73
US4814678AMar 21, 1989
Speed control apparatus for motor
HITACHI LTD13 citations73
US4468724AAug 28, 1984
Method and apparatus for controlling load current
HITACHI LTD16 citations73
US5033565AJul 23, 1991
Motor-driven power steering apparatus
HITACHI LTD18 citations72
US4207478AJun 10, 1980
DC Chopper device
HITACHI LTD13 citations69
US4249236AFeb 3, 1981
Controller for power converter
HITACHI LTD16 citations67