P

Inventor

MASAKI RYOSO

JP84 patents
⚠️ This page may combine multiple inventors who share the name “MASAKI RYOSO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

45 patents
US6281656B1Aug 28, 2001

Synchronous motor control device electric motor vehicle control device and method of controlling synchronous motor

HITACHI LTD121 citations99
US6053833AApr 25, 2000

Transmission, and vehicle and bicycle using the same

HITACHI LTD258 citations99
US5549172AAug 27, 1996

Electric vehicle drive system and drive method

HITACHI LTD201 citations99
US6501243B1Dec 31, 2002

Synchronous motor-control apparatus and vehicle using the control apparatus

HITACHI LTD105 citations98
US6470983B1Oct 29, 2002

Hybrid vehicle

HITACHI LTD97 citations98
US6258006B1Jul 10, 2001

Transmission, vehicle, hybrid vehicle, and control unit therefor

HITACHI LTD86 citations98
US5914582AJun 22, 1999

Permanent magnet synchronous motor controller and electric vehicle controller

HITACHI LTD136 citations98
US5726551AMar 10, 1998

Battery charging device having time shared charging cycle

HITACHI LTD109 citations98
US5414339AMay 9, 1995

Electric vehicle control system

HITACHI LTD139 citations98
US5355749AOct 18, 1994

Control apparatus and control method for motor drive vehicle

HITACHI LTD214 citations98
US5357181AOct 18, 1994

Failure detection method for electric vehicles and fail-safe control method using this method

HITACHI LTD123 citations98
US5239490AAug 24, 1993

Device for detecting rotation of rotary shaft and rotation controlling apparatus using the same

HITACHI LTD126 citations98
US6788024B2Sep 7, 2004

Position-sensorless motor control method and apparatus

HITACHI LTD90 citations97
US5481460AJan 2, 1996

Controller for electric vehicle

HITACHI LTD109 citations97
US6696812B2Feb 24, 2004

Control apparatus for electric motor

HITACHI LTD54 citations96
US6692405B2Feb 17, 2004

Power transmission apparatus for an automobile

HITACHI LTD60 citations96
US6555988B2Apr 29, 2003

Motor control device

HITACHI LTD67 citations96
US6507127B1Jan 14, 2003

Hybrid vehicle

HITACHI LTD65 citations96
US6456030B1Sep 24, 2002

Synchronous motor control device, electric motor vehicle control device and method of controlling synchronous motor

HITACHI LTD49 citations96
US6328670B1Dec 11, 2001

Power transmission apparatus for an automobile

HITACHI LTD70 citations96
US6198256B1Mar 6, 2001

Control apparatus for a synchronous generator system and a hybrid-type electric vehicle using it

HITACHI LTD58 citations96
US6142907ANov 7, 2000

Power transmission apparatus for an automobile

HITACHI LTD42 citations96
US5583406ADec 10, 1996

Control method and system for regeneration braking of an electric vehicle

HITACHI LTD89 citations96
US5481168AJan 2, 1996

Electric vehicle torque controller

HITACHI LTD67 citations96
US5467275ANov 14, 1995

Control apparatus for electric vehicle

HITACHI LTD51 citations96
US5345155ASep 6, 1994

Control system for electric vehicle

HITACHI LTD100 citations96
US5309073AMay 3, 1994

Electric vehicle control device

HITACHI LTD67 citations96
US6557656B2May 6, 2003

Driving system and vehicle

HITACHI LTD61 citations95
US6979977B2Dec 27, 2005

Power controller for a vehicle

HITACHI LTD30 citations93
US6844697B2Jan 18, 2005

Motor controller

HITACHI LTD34 citations93
US6806588B2Oct 19, 2004

Power controller for a vehicle

HITACHI LTD28 citations93
US6771039B2Aug 3, 2004

Motor control apparatus and method

HITACHI LTD20 citations93
US6700343B2Mar 2, 2004

Motor controller

HITACHI LTD38 citations93
US6653745B1Nov 25, 2003

Power source apparatus for a car

HITACHI LTD41 citations93
US6426608B2Jul 30, 2002

Automobile and power supply system therefor

HITACHI LTD51 citations93
US6318486B2Nov 20, 2001

Hybrid vehicle

HITACHI LTD32 citations93
US6248036B1Jun 19, 2001

Transmission and vehicle and bicycle using the same

HITACHI LTD34 citations93
US6234930B1May 22, 2001

Transmission and vehicle using same

HITACHI LTD42 citations93
US6223842B1May 1, 2001

Hybrid vehicle

HITACHI LTD44 citations93
US5677604AOct 14, 1997

Control system and control method for electric automobile

HITACHI LTD34 citations93
US5534764AJul 9, 1996

Vehicle driving control system having function for suppressing vibration

HITACHI LTD44 citations93
US5532571AJul 2, 1996

Control apparatus for induction motor

HITACHI LTD26 citations93
US6914408B2Jul 5, 2005

Motor control apparatus and electric vehicle using same

HITACHI LTD19 citations92
US6255798B1Jul 3, 2001

Control apparatus for electric vehicle

HITACHI LTD34 citations92
US6008617ADec 28, 1999

Motor control device for high frequency AC driven motor

HITACHI LTD21 citations92

HITACHI METALS LTD

1 patent
US8373326B2Feb 12, 2013

Axial gap motor, compressor, motor system, and power generator

HITACHI METALS LTD29 citations92

HITACHI IND EQUIPMENT SYS

1 patent
US7649298B2Jan 19, 2010

Claw teeth type electric rotary machine and manufacturing method for stators

HITACHI IND EQUIPMENT SYS21 citations92

HITACHI CAR ENG CO LTD

1 patent
US6938713B1Sep 6, 2005

Dynamotor of hybrid vehicle, and method of control thereof

HITACHI CAR ENG CO LTD47 citations92

HITACHI CABLE

1 patent
US6926115B2Aug 9, 2005

Angle sensor, angle-torque sensor and electric power steering unit using same

HITACHI CABLE18 citations92

(unassigned)

1 patent
US6320349B1Nov 20, 2001

Method of estimating field pole position of synchronous motor, motor controller, and electric vehicle

47 citations92

Showing the top 50 of 84 patents by PatentIndex Score.