Inventor · disambiguated record
Masahiko Akamatsu
Also filed as: AKAMATSU MASAHIKO
52 granted patents·6 pending applications·896 citations·filing 1974–2022
98Inventor score
Top patents by PatentIndex Score
58 records- 0196US4321518AInductor type synchronous motor driving system for minute control of the position and the rotation angle of the motorMITSUBISHI ELECTRIC CORP·Filed 1978·Granted Mar 23, 1982·66 cites·27 claims
- 0296US4134055AInductor type synchronous motor driving systemMITSUBISHI ELECTRIC CORP·Filed 1976·Granted Jan 9, 1979·67 cites·9 claims
- 0391US4084220APower converterMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Apr 11, 1978·46 cites·19 claims
- 0489US4161680AAC rotary machine apparatusMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Jul 17, 1979·43 cites·20 claims
- 0588US4310791AInduction motor control systemMITSUBISHI ELECTRIC CORP·Filed 1980·Granted Jan 12, 1982·48 cites·5 claims
- 0688US4298838ATransformer deviceMITSUBISHI ELECTRIC CORP·Filed 1978·Granted Nov 3, 1981·44 cites·3 claims
- 0787US4002958AAC output power control systemMITSUBISHI ELECTRIC CORP·Filed 1974·Granted Jan 11, 1977·35 cites·7 claims
- 0884US10229539B2Component assembly work support system and component assembly methodKAWASAKI HEAVY IND LTD·Filed 2014·Granted Mar 12, 2019·9 cites·10 claims
- 0983US5886888AVoltage source type power converting apparatusMITSUBISHI ELECTRIC CORP·Filed 1996·Granted Mar 23, 1999·80 cites·7 claims
- 1081US4218646AAC Feeding apparatus and rotating field apparatus having AC feeding apparatusMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Aug 19, 1980·24 cites·5 claims
- 1179US4172991AAC current control system for AC power supplyMITSUBISHI ELECTRIC CORP·Filed 1978·Granted Oct 30, 1979·23 cites·8 claims
- 1279US4140961AShunt circuit for an insulation type current transformer to adapt to a wide-band of frequencyMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Feb 20, 1979·22 cites·6 claims
- 1379US4134054AHomopolar synchronous machineMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Jan 9, 1979·32 cites·6 claims
- 1474US4160938AMotor drive apparatusMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Jul 10, 1979·19 cites·8 claims
- 1573US6215682B1Semiconductor power converter and its applied apparatusMITSUBISHI ELECTRIC CORP·Filed 1998·Granted Apr 10, 2001·46 cites·8 claims
- 1672US10140767B2Workpiece machining work support system and workpiece machining methodKAWASAKI HEAVY IND LTD·Filed 2014·Granted Nov 27, 2018·4 cites·14 claims
- 1771US4087703ASemiconductor switch deviceMITSUBISHI ELECTRIC CORP·Filed 1976·Granted May 2, 1978·11 cites·13 claims
- 1871US4010387APower transistor switching apparatusMITSUBISHI ELECTRIC CORP·Filed 1975·Granted Mar 1, 1977·11 cites·3 claims
- 1970US10166621B2Welding device and welding systemKAWASAKI HEAVY IND LTD·Filed 2014·Granted Jan 1, 2019·2 cites·7 claims
- 2069US4107551AThyristor turn-off systemMITSUBISHI ELECTRIC CORP·Filed 1976·Granted Aug 15, 1978·15 cites·7 claims
- 2168US4110669ASynchronous machine control systemMITSUBISHI ELECTRIC CORP·Filed 1976·Granted Aug 29, 1978·21 cites·13 claims
- 2267US6052297APower conversion apparatusMITSUBISHI ELECTRIC CORP·Filed 1999·Granted Apr 18, 2000·58 cites·17 claims
- 2366US4309643ADriving method of motor fed by electric valve feeding apparatus and the same apparatusMITSUBISHI ELECTRIC CORP·Filed 1979·Granted Jan 5, 1982·14 cites·31 claims
- 2464US5942880ACompensation control device for a power systemMITSUBISHI ELECTRIC CORP·Filed 1998·Granted Aug 24, 1999·31 cites·15 claims
- 2559US4319176ASynchronous machine drive apparatusMITSUBISHI ELECTRIC CORP·Filed 1978·Granted Mar 9, 1982·16 cites·7 claims
- 2657US3942094ACommutation circuit and applications thereofMITSUBISHI ELECTRIC CORP·Filed 1974·Granted Mar 2, 1976·10 cites·13 claims
- 2756US2016078682A1Component mounting work support system and component mounting methodKAWASAKI HEAVY IND LTD·Filed 2014·Application pending·0 cites
- 2854US4491742ASemiconductor switch deviceMITSUBISHI ELECTRIC CORP·Filed 1982·Granted Jan 1, 1985·9 cites·4 claims
- 2953US4146921APower control or conversion apparatusMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Mar 27, 1979·9 cites·15 claims
- 3052US11292073B2Welding torch and all-position welding deviceKAWASAKI HEAVY IND LTD·Filed 2017·Granted Apr 5, 2022·0 cites·9 claims
- 3152US4189651ATransistor switch deviceMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Feb 19, 1980·6 cites·10 claims
- 3252US2024342902A1Robot system, robotic processing method, and processing programKAWASAKI HEAVY IND LTD·Filed 2022·Application pending·0 cites
- 3352US2024261975A1Robot system, machining method of robot, and machining programKAWASAKI HEAVY IND LTD·Filed 2022·Application pending·0 cites
- 3450US12343873B2Control device, control system, robot system, and control methodKAWASAKI HEAVY IND LTD·Filed 2020·Granted Jul 1, 2025·0 cites·22 claims
- 3549US11292070B2Welding torch and all-position welding deviceKAWASAKI HEAVY IND LTD·Filed 2017·Granted Apr 5, 2022·0 cites·7 claims
- 3649US2024198523A1Robot system, and control method and control program thereofKAWASAKI HEAVY IND LTD·Filed 2022·Application pending·0 cites
- 3749US2025013418A1Work assistance systemKAWASAKI HEAVY IND LTD·Filed 2022·Application pending·0 cites
- 3847US12409004B2Master-slave system and controlling methodKAWASAKI HEAVY IND LTD·Filed 2020·Granted Sep 9, 2025·0 cites·14 claims
- 3946US4239988ATurn off method for power transistor switchMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Dec 16, 1980·4 cites·2 claims
- 4044US4251757APower control system and apparatus thereofMITSUBISHI ELECTRIC CORP·Filed 1979·Granted Feb 17, 1981·6 cites·39 claims
- 4144US4162413ASemiconductor switchMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Jul 24, 1979·4 cites·4 claims
- 4244US4107552ASemiconductor switchMITSUBISHI ELECTRIC CORP·Filed 1976·Granted Aug 15, 1978·4 cites·6 claims
- 4343US4164667ASemiconductor switch deviceMITSUBISHI ELECTRIC CORP·Filed 1977·Granted Aug 14, 1979·4 cites·9 claims
- 4442US5646511APower system compensator apparatus and power converter apparatusMITSUBISHI ELECTRIC CORP·Filed 1995·Granted Jul 8, 1997·18 cites·7 claims
- 4541US10646946B2Weld overlay systemKAWASAKI HEAVY IND LTD·Filed 2014·Granted May 12, 2020·0 cites·4 claims
- 4641US4506319AInductively commutated thyristor inverterMITSUBISHI ELECTRIC CORP·Filed 1982·Granted Mar 19, 1985·6 cites·5 claims
- 4740US3984752AElectrical valve circuit apparatusMITSUBISHI ELECTRIC CORP·Filed 1974·Granted Oct 5, 1976·4 cites·9 claims
- 4839US4472642APower semiconductor switching deviceMITSUBISHI ELECTRIC CORP·Filed 1982·Granted Sep 18, 1984·6 cites·12 claims
- 4938US10245671B2Weld overlay systemKAWASAKI HEAVY IND LTD·Filed 2015·Granted Apr 2, 2019·0 cites·5 claims
- 5038US4030021AInverterMITSUBISHI ELECTRIC CORP·Filed 1975·Granted Jun 14, 1977·4 cites·12 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Masahiko Akamatsu files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →