Inventor

Shotaro Naito

Inventor

Katsuta, JP

Overview

31→

Patents

1977–2004

Patent span

Performing operations

Primary field (CPC B)

Patents· 31 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B60Lprimary

B60LPropulsion of electrically-propelled vehicles16%

Y02TClimate change mitigation technologies related to transportation16%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters5%

B60KArrangement or mounting of propulsion units or of transmissions in vehicles4%

B60WConjoint control of vehicle sub-units of different type or different function4%

F02DControlling combustion engines4%

F02NStarting of combustion engines4%

G01PMeasuring linear or angular speed, acceleration, deceleration, or shock4%

B60GVehicle suspension arrangements2%

PatentTitleYear

6,766,874'System for driving hybrid vehicle, method thereof and electric power supply system therefor'2004 6,752,226'System for driving hybrid vehicle, method thereof and electric power supply system therefor'2004 6,236,172'Driving system for electric vehicle'2001 5,808,448'Method and apparatus for operating an electric vehicle having a hybrid battery'1998 5,793,106'Semiconductor device'1998 5,780,980'Electric car drive system provided with hybrid battery and control method'1998 5,631,796'Electric vehicle control system'1997 5,600,215'Controller for electric vehicle'1997 5,567,880'Semiconductor accelerometer'1996 5,557,181'Brake control apparatus for electric motor vehicle'1996 5,544,523'Physical quantity sensor arrangement'1996 5,476,310'Braking apparatus for electric vehicle'1995 5,357,181'Failure detection method for electric vehicles and fail-safe control method using this method'1994 5,228,341'Capacitive acceleration detector having reduced mass portion'1993 4,970,645'Suspension control method and apparatus for vehicle'1990 4,874,053'Torque detecting apparatus'1989 4,745,319'Magneto D.C. motor having elastic magnet mounting retainers'1988 4,732,120'Control apparatus for internal combustion engine provided with permanent magnet type starting motor'1988 4,665,497'Electronic odometer'1987 4,635,034'Display apparatus for vehicle'1987 4,580,083'Chopper controller for a D.C. motor'1986 4,564,905'Trip computer for vehicles'1986 4,553,196'Power source system for vehicular electronic device'1985 4,500,820'Protective control apparatus for electrical vehicle'1985 4,398,260'Skid control method'1983 4,366,420'Electromobile control device'1982 4,222,005'Testing device for generator output voltage regulators'1980 4,150,324'Speed control system of traction motor for electric vehicles'1979 4,124,812'Braking control apparatus for an electric motor operated vehicle'1978 4,039,853'Magnetizing device for permanent magnet motor for electric vehicle'1977 4,025,836'Protective system against commutation failure in a chopper circuit'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–2004Patents assigned to HITACHI LTD (31)· patent assignee history

1977–1997Based in Katsuta, JP· patent location history

1993–1997Patents assigned to HITACHI AUTOMOTIVE ENG (3)· patent assignee history

1997–2004Based in Hitachinaka, JP· patent location history

1998Based in Hitahinaka, JP· patent location history

1998Based in Hitachinaki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	31	1977–2004
HITACHI AUTOMOTIVE ENG	3	1993–1997

Locations

Location	Patents	Span
Katsuta, JP	24	1977–1997
Hitachinaka, JP	5	1997–2004
Hitahinaka, JP	1	1998
Hitachinaki, JP	1	1998