Inventor · disambiguated record
Masahiro Hiraga
Also filed as: HIRAGA MASAHIRO
19 granted patents·6 pending applications·314 citations·filing 1998–2021
95Inventor score
Files withHITACHI IND EQUIPMENT SYS6HITACHI LTD6HIROTA MASAYUKI4HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD3IBORI SATOSHI3
Top patents by PatentIndex Score
25 records- 0191US8159820B2Electric power conversion systemIBORI SATOSHI·Filed 2008·Granted Apr 17, 2012·38 cites·8 claims
- 0282US6704212B2PWM inverter with long carrier wave insertionHITACHI LTD·Filed 2002·Granted Mar 9, 2004·44 cites·22 claims
- 0378US7904254B2Power conversion apparatus and method of estimating power cycle lifeHITACHI IND EQUIPMENT SYS·Filed 2008·Granted Mar 8, 2011·9 cites·20 claims
- 0476US8120294B2Power transducerIBORI SATOSHI·Filed 2009·Granted Feb 21, 2012·9 cites·8 claims
- 0575US6556464B2PWM converter systemHITACHI LTD·Filed 2001·Granted Apr 29, 2003·30 cites·11 claims
- 0674US7515422B2Electric power converterHITACHI IND EQUIPMENT SYSTEM C·Filed 2006·Granted Apr 7, 2009·13 cites·7 claims
- 0774US6496397B2Inverter deviceHITACHI LTD·Filed 2001·Granted Dec 17, 2002·29 cites·5 claims
- 0871US6286008B1Electronic information distribution method and recording mediumFUJITSU LTD·Filed 1998·Granted Sep 4, 2001·49 cites·16 claims
- 0967US8531140B2Power transducerIBORI SATOSHI·Filed 2013·Granted Sep 10, 2013·1 cites·7 claims
- 1067US7394668B2Switching power supply circuit and frequency converterHITACHI IND EQUIPMENT SYS·Filed 2006·Granted Jul 1, 2008·7 cites·16 claims
- 1164US6486548B1Semiconductor module and power converting apparatus using the moduleHITACHI LTD·Filed 1998·Granted Nov 26, 2002·28 cites·14 claims
- 1264US5949663AInverter apparatus capable of readily modification of the specification and performance thereofHITACHI LTD·Filed 1998·Granted Sep 7, 1999·31 cites·20 claims
- 1358US8423317B2Temperature detection method of semiconductor device and power conversion apparatusKAMEZAWA TOMOYA·Filed 2005·Granted Apr 16, 2013·3 cites·6 claims
- 1458US6693404B2AC current detecting device for inverter apparatus and AC current detecting method thereforHITACHI LTD·Filed 2002·Granted Feb 17, 2004·14 cites·7 claims
- 1557US11870384B2Speed calculation device and power conversion deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2018·Granted Jan 9, 2024·0 cites·14 claims
- 1654US2013342136A1Power transducerHITACHI IND EQUIPMENT SYS·Filed 2013·Application pending·0 cites
- 1753US12294328B2Power conversion deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2021·Granted May 6, 2025·0 cites·15 claims
- 1851US8378599B2Power transducerHITACHI IND EQUIPMENT SYS·Filed 2012·Granted Feb 19, 2013·0 cites·10 claims
- 1951US7643304B2Filter apparatus and frequency converter to which the filter apparatus is connectedHITACHI IND EQUIPMENT SYS·Filed 2004·Granted Jan 5, 2010·6 cites·11 claims
- 2045US2023268823A1Power Conversion Device and Remote Monitoring SystemHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2021·Application pending·0 cites
- 2142US2009040743A1Filter apparatus and frequency coverter to which the filter apparatus is connectedHIROTA MASAYUKI·Filed 2008·Application pending·0 cites
- 2242US2009046434A1Filter apparatus and frequency converter to which the filter apparatus is connectedHIROTA MASAYUKI·Filed 2008·Application pending·0 cites
- 2342US2009040733A1Filter apparatus and frequency converter to which the filter apparatus is connectedHIROTA MASAYUKI·Filed 2008·Application pending·0 cites
- 2442US2009046435A1Filter apparatus and frequency converter to which the filter apparatus is connectedHIROTA MASAYUKI·Filed 2008·Application pending·0 cites
- 2541US7151680B2Switching power supply circuit and frequency converterHITACHI IND EQUIPMENT SYS·Filed 2003·Granted Dec 19, 2006·3 cites·19 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →