Inventor
MARUMOTO KATSUJI
JP28 patents
⚠️ This page may combine multiple inventors who share the name “MARUMOTO KATSUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
24 patentsUS5818178AOct 6, 1998
Valve control apparatus for an automobile
HITACHI LTD73 citations96
US5231344AJul 27, 1993
Control apparatus for electric generator
HITACHI LTD75 citations96
US5448154ASep 5, 1995
Control device for battery charging AC generator used in motor vehicle
HITACHI LTD68 citations95
US4869334ASep 26, 1989
Electric motor-driven power steering apparatus
HITACHI LTD70 citations95
US5947086ASep 7, 1999
Throttle valve control apparatus
HITACHI LTD29 citations93
US5262711ANov 16, 1993
Charging generator for a vehicle including a circuit for suppressing a sudden change in a field current
HITACHI LTD39 citations93
US6837217B1Jan 4, 2005
Method and apparatus for motor-driven throttle valve, automobile, method of measuring temperature of motor for driving automotive throttle valve, and method of measuring motor temperature
HITACHI LTD29 citations92
US6055960AMay 2, 2000
Electronic throttle valve control apparatus
HITACHI LTD23 citations92
US5105143AApr 14, 1992
Control system for automotive charging generator
HITACHI LTD22 citations92
US4865148ASep 12, 1989
Vehicle height control apparatus responsive to power steering operation
HITACHI LTD45 citations92
US4753309AJun 28, 1988
Electric power steering apparatus
HITACHI LTD40 citations92
US5521486AMay 28, 1996
Charging generator with self-diagnosis function
HITACHI LTD24 citations90
US4366420ADec 28, 1982
Electromobile control device
HITACHI LTD21 citations82
US4926960AMay 22, 1990
Electric power steering apparatus for vehicle
HITACHI LTD21 citations80
US4291259ASep 22, 1981
Control apparatus for controlling transistor chopper for use in current supply for electric motor
HITACHI LTD20 citations75
US7240665B2Jul 10, 2007
Method and apparatus for controlling motor-driven throttle valve, automobile, method of measuring temperature of motor for driving automotive throttle valve, and method of measuring motor temperature
HITACHI LTD9 citations74
US6390064B2May 21, 2002
Electronic throttle valve control apparatus
HITACHI LTD13 citations74
US6253733B1Jul 3, 2001
Electronic throttle valve control apparatus
HITACHI LTD13 citations74
US4580083AApr 1, 1986
Chopper controller for a D.C. motor
HITACHI LTD11 citations74
US4218730AAug 19, 1980
Transistor switching apparatus for use in the control of a D.C. load
HITACHI LTD14 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
US5033565AJul 23, 1991
Motor-driven power steering apparatus
HITACHI LTD18 citations72
US4207478AJun 10, 1980
DC Chopper device
HITACHI LTD13 citations69
AGENCY IND SCIENCE TECHN
3 patentsUS4174645ANov 20, 1979
Automatic change-gear control device for use in electromobile
AGENCY IND SCIENCE TECHN29 citations82
US4096418AJun 20, 1978
Automatic change-gear control device for use in electromobile
AGENCY IND SCIENCE TECHN23 citations82
US3987349AOct 19, 1976
Control systems of electric motors for driving electric motor cars
AGENCY IND SCIENCE TECHN6 citations63