Inventor
AKAMATSU MASAHIKO
JP54 patents
⚠️ This page may combine multiple inventors who share the name “AKAMATSU MASAHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI ELECTRIC CORP
43 patentsUS4321518AMar 23, 1982
Inductor type synchronous motor driving system for minute control of the position and the rotation angle of the motor
MITSUBISHI ELECTRIC CORP66 citations96
US4134055AJan 9, 1979
Inductor type synchronous motor driving system
MITSUBISHI ELECTRIC CORP67 citations96
US5886888AMar 23, 1999
Voltage source type power converting apparatus
MITSUBISHI ELECTRIC CORP80 citations94
US6215682B1Apr 10, 2001
Semiconductor power converter and its applied apparatus
MITSUBISHI ELECTRIC CORP46 citations93
US6052297AApr 18, 2000
Power conversion apparatus
MITSUBISHI ELECTRIC CORP58 citations93
US4310791AJan 12, 1982
Induction motor control system
MITSUBISHI ELECTRIC CORP48 citations93
US4161680AJul 17, 1979
AC rotary machine apparatus
MITSUBISHI ELECTRIC CORP43 citations93
US4134054AJan 9, 1979
Homopolar synchronous machine
MITSUBISHI ELECTRIC CORP32 citations93
US4084220AApr 11, 1978
Power converter
MITSUBISHI ELECTRIC CORP46 citations93
US4002958AJan 11, 1977
AC output power control system
MITSUBISHI ELECTRIC CORP35 citations93
US5942880AAug 24, 1999
Compensation control device for a power system
MITSUBISHI ELECTRIC CORP31 citations92
US4298838ANov 3, 1981
Transformer device
MITSUBISHI ELECTRIC CORP44 citations92
US5646511AJul 8, 1997
Power system compensator apparatus and power converter apparatus
MITSUBISHI ELECTRIC CORP18 citations83
US4218646AAug 19, 1980
AC Feeding apparatus and rotating field apparatus having AC feeding apparatus
MITSUBISHI ELECTRIC CORP24 citations82
US4140961AFeb 20, 1979
Shunt circuit for an insulation type current transformer to adapt to a wide-band of frequency
MITSUBISHI ELECTRIC CORP22 citations82
US4110669AAug 29, 1978
Synchronous machine control system
MITSUBISHI ELECTRIC CORP21 citations82
US4172991AOct 30, 1979
AC current control system for AC power supply
MITSUBISHI ELECTRIC CORP23 citations80
US4491742AJan 1, 1985
Semiconductor switch device
MITSUBISHI ELECTRIC CORP9 citations74
US4319176AMar 9, 1982
Synchronous machine drive apparatus
MITSUBISHI ELECTRIC CORP16 citations74
US4309643AJan 5, 1982
Driving method of motor fed by electric valve feeding apparatus and the same apparatus
MITSUBISHI ELECTRIC CORP14 citations74
US4160938AJul 10, 1979
Motor drive apparatus
MITSUBISHI ELECTRIC CORP19 citations74
US4146921AMar 27, 1979
Power control or conversion apparatus
MITSUBISHI ELECTRIC CORP9 citations74
US4107551AAug 15, 1978
Thyristor turn-off system
MITSUBISHI ELECTRIC CORP15 citations74
US4087703AMay 2, 1978
Semiconductor switch device
MITSUBISHI ELECTRIC CORP11 citations74
US4010387AMar 1, 1977
Power transistor switching apparatus
MITSUBISHI ELECTRIC CORP11 citations74
US3942094AMar 2, 1976
Commutation circuit and applications thereof
MITSUBISHI ELECTRIC CORP10 citations74
US4506319AMar 19, 1985
Inductively commutated thyristor inverter
MITSUBISHI ELECTRIC CORP6 citations63
US4472642ASep 18, 1984
Power semiconductor switching device
MITSUBISHI ELECTRIC CORP6 citations63
US4338617AJul 6, 1982
Four terminal GTO thyristor with transistor controlled turn-off
MITSUBISHI ELECTRIC CORP3 citations63
US4251757AFeb 17, 1981
Power control system and apparatus thereof
MITSUBISHI ELECTRIC CORP6 citations63
US4239988ADec 16, 1980
Turn off method for power transistor switch
MITSUBISHI ELECTRIC CORP4 citations63
US4189651AFeb 19, 1980
Transistor switch device
MITSUBISHI ELECTRIC CORP6 citations63
US4164667AAug 14, 1979
Semiconductor switch device
MITSUBISHI ELECTRIC CORP4 citations63
US4162413AJul 24, 1979
Semiconductor switch
MITSUBISHI ELECTRIC CORP4 citations63
US4107552AAug 15, 1978
Semiconductor switch
MITSUBISHI ELECTRIC CORP4 citations63
US4030021AJun 14, 1977
Inverter
MITSUBISHI ELECTRIC CORP4 citations63
US3992657ANov 16, 1976
AC feed control system
MITSUBISHI ELECTRIC CORP3 citations63
US3984752AOct 5, 1976
Electrical valve circuit apparatus
MITSUBISHI ELECTRIC CORP4 citations61
US6078066AJun 20, 2000
Power semiconductor switching device
MITSUBISHI ELECTRIC CORP4 citations60
US4107772AAug 15, 1978
Chopper control device
MITSUBISHI ELECTRIC CORP2 citations59
US4488059ADec 11, 1984
Semiconductor switch device
MITSUBISHI ELECTRIC CORP1 citations52
US4287434ASep 1, 1981
Semiconductor switch device
MITSUBISHI ELECTRIC CORP1 citations52
US4066956AJan 3, 1978
Semiconductor switch device having means for supplying control current to a control electrode
MITSUBISHI ELECTRIC CORP1 citations52
KAWASAKI HEAVY IND LTD
6 patentsUS10229539B2Mar 12, 2019
Component assembly work support system and component assembly method
KAWASAKI HEAVY IND LTD9 citations81
US10166621B2Jan 1, 2019
Welding device and welding system
KAWASAKI HEAVY IND LTD2 citations71
US10140767B2Nov 27, 2018
Workpiece machining work support system and workpiece machining method
KAWASAKI HEAVY IND LTD4 citations70
US11292073B2Apr 5, 2022
Welding torch and all-position welding device
KAWASAKI HEAVY IND LTD0 citations55
US12409004B2Sep 9, 2025
Master-slave system and controlling method
KAWASAKI HEAVY IND LTD0 citations50
US12343873B2Jul 1, 2025
Control device, control system, robot system, and control method
KAWASAKI HEAVY IND LTD0 citations50
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