P

Inventor

NARITA HIROSHI

JP51 patents
⚠️ This page may combine multiple inventors who share the name “NARITA HIROSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

17 patents
US5430311AJul 4, 1995

Constant-voltage diode for over-voltage protection

HITACHI LTD128 citations97
US4335337AJun 15, 1982

Control system for electric motor vehicle

HITACHI LTD68 citations96
US4490666ADec 25, 1984

Control of induction motor using PWM inverter

HITACHI LTD34 citations92
US5424937AJun 13, 1995

Gate drive power source for electric power converter

HITACHI LTD21 citations91
US4701682AOct 20, 1987

Control system for maintaining traction of rolling stock

HITACHI LTD53 citations90
US4327313AApr 27, 1982

Control apparatus for electric car

HITACHI LTD27 citations81
US4675799AJun 23, 1987

Control system for power converter

HITACHI LTD21 citations80
US4315203AFeb 9, 1982

Control system for induction motor-driven car

HITACHI LTD24 citations80
US4338558AJul 6, 1982

Induction motor control system and method

HITACHI LTD14 citations74
US4171506AOct 16, 1979

Control apparatus for an electric car

HITACHI LTD7 citations74
US4087727AMay 2, 1978

Regenerative brake control system for DC motor

HITACHI LTD13 citations73
US3983465ASep 28, 1976

Electric braking control apparatus for DC motor

HITACHI LTD17 citations73
US4163191AJul 31, 1979

Magnetic phase shifter control system

HITACHI LTD2 citations63
US4095152AJun 13, 1978

Regenerative brake control system for dc motor

HITACHI LTD4 citations63
US3947739AMar 30, 1976

Regenerative braking controller for a DC motor

HITACHI LTD3 citations62
US4284934AAug 18, 1981

Motor control apparatus with an improved thyristor chopper circuit

HITACHI LTD4 citations60
US4209733AJun 24, 1980

Motor control apparatus with an improved thyristor chopper circuit

HITACHI LTD2 citations60

SEIKO EPSON CORP

10 patents

TANABE SEIYAKU CO

9 patents

DU PONT

5 patents

NIPPON STEEL CORP

2 patents

SAPPORO BREWERIES

1 patent

KINOSHITA YOSHIKI

1 patent

SAMSUNG ELECTRONICS CO LTD

1 patent

THOMAS & BETTS CORP

1 patent

OTAX CO LTD

1 patent

NARITA HIROSHI

1 patent

UNIV NAGOYA CITY PUBLIC UNIV CORP

1 patent

Showing the top 50 of 51 patents by PatentIndex Score.