Inventor · disambiguated record
Katsuji Marumoto
Also filed as: KURIYAMA SCHIGERU · MARUMOTO KATSUJI · OHMAE TSUTOMU
28 granted patents·2 pending applications·779 citations·filing 1973–2010
97Inventor score
Top patents by PatentIndex Score
30 records- 0193US5818178AValve control apparatus for an automobileHITACHI LTD·Filed 1996·Granted Oct 6, 1998·73 cites·8 claims
- 0292US4869334AElectric motor-driven power steering apparatusHITACHI LTD·Filed 1988·Granted Sep 26, 1989·70 cites·17 claims
- 0382US7240665B2Method 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 temperatureHITACHI LTD·Filed 2005·Granted Jul 10, 2007·9 cites·3 claims
- 0482US4753309AElectric power steering apparatusHITACHI LTD·Filed 1986·Granted Jun 28, 1988·40 cites·13 claims
- 0581US6837217B1Method and apparatus for motor-driven throttle valve, automobile, method of measuring temperature of motor for driving automotive throttle valve, and method of measuring motor temperatureHITACHI LTD·Filed 1999·Granted Jan 4, 2005·29 cites·9 claims
- 0681US4865148AVehicle height control apparatus responsive to power steering operationHITACHI LTD·Filed 1988·Granted Sep 12, 1989·45 cites·6 claims
- 0778US5231344AControl apparatus for electric generatorHITACHI LTD·Filed 1992·Granted Jul 27, 1993·75 cites·23 claims
- 0876US4096418AAutomatic change-gear control device for use in electromobileAGENCY IND SCIENCE TECHN·Filed 1977·Granted Jun 20, 1978·23 cites·1 claims
- 0975US5448154AControl device for battery charging AC generator used in motor vehicleHITACHI LTD·Filed 1993·Granted Sep 5, 1995·68 cites·13 claims
- 1074US6055960AElectronic throttle valve control apparatusHITACHI LTD·Filed 1999·Granted May 2, 2000·23 cites·5 claims
- 1174US4174645AAutomatic change-gear control device for use in electromobileAGENCY IND SCIENCE TECHN·Filed 1976·Granted Nov 20, 1979·29 cites·2 claims
- 1273US5947086AThrottle valve control apparatusHITACHI LTD·Filed 1997·Granted Sep 7, 1999·29 cites·12 claims
- 1372US4207478ADC Chopper deviceHITACHI LTD·Filed 1978·Granted Jun 10, 1980·13 cites·6 claims
- 1471US6390064B2Electronic throttle valve control apparatusHITACHI LTD·Filed 2001·Granted May 21, 2002·13 cites·4 claims
- 1571US6253733B1Electronic throttle valve control apparatusHITACHI LTD·Filed 2000·Granted Jul 3, 2001·13 cites·5 claims
- 1670US4291259AControl apparatus for controlling transistor chopper for use in current supply for electric motorHITACHI LTD·Filed 1979·Granted Sep 22, 1981·20 cites·21 claims
- 1765US4218730ATransistor switching apparatus for use in the control of a D.C. loadHITACHI LTD·Filed 1978·Granted Aug 19, 1980·14 cites·11 claims
- 1864US4366420AElectromobile control deviceHITACHI LTD·Filed 1980·Granted Dec 28, 1982·21 cites·22 claims
- 1964US4211961AControl circuit for use in control of current supply for electric motor with improved duty controlling oscillator circuit, particularly for electrical vehicleHITACHI LTD·Filed 1978·Granted Jul 8, 1980·18 cites·10 claims
- 2063US5262711ACharging generator for a vehicle including a circuit for suppressing a sudden change in a field currentHITACHI LTD·Filed 1991·Granted Nov 16, 1993·39 cites·32 claims
- 2162US4926960AElectric power steering apparatus for vehicleHITACHI LTD·Filed 1988·Granted May 22, 1990·21 cites·4 claims
- 2259US5033565AMotor-driven power steering apparatusHITACHI LTD·Filed 1989·Granted Jul 23, 1991·18 cites·8 claims
- 2353US5105143AControl system for automotive charging generatorHITACHI LTD·Filed 1989·Granted Apr 14, 1992·22 cites·16 claims
- 2450US5521486ACharging generator with self-diagnosis functionHITACHI LTD·Filed 1994·Granted May 28, 1996·24 cites·12 claims
- 2548US4580083AChopper controller for a D.C. motorHITACHI LTD·Filed 1984·Granted Apr 1, 1986·11 cites·22 claims
- 2648US3987349AControl systems of electric motors for driving electric motor carsAGENCY IND SCIENCE TECHN·Filed 1974·Granted Oct 19, 1976·6 cites·4 claims
- 2745US4960178AMotor-driven power steering apparatusHITACHI LTD·Filed 1988·Granted Oct 2, 1990·10 cites·4 claims
- 2837US2010244754A1Sensorless-Brushless Motor Control Device and Electric Fluid Pump Using the SameHITACHI CAR ENG CO LTD·Filed 2010·Application pending·0 cites
- 2935US2005092295A1Method 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 temperatureFiled 2004·Application pending·0 cites
- 3034US4075541ADirect current motor control device for use in battery automobilesKEISHIN MATSUMOTO·Filed 1973·Granted Feb 21, 1978·3 cites·1 claims
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