Inventor · disambiguated record
Masahiro Nagasu
Also filed as: NAGASU MASAHIRO
26 granted patents·5 pending applications·643 citations·filing 1995–2012
97Inventor score
Top patents by PatentIndex Score
31 records- 0196US7570085B2Gate driver circuit for switching deviceHITACHI LTD·Filed 2007·Granted Aug 4, 2009·37 cites·12 claims
- 0294US6271709B1Gate drive circuit of voltage drive switching elementHITACHI LTD·Filed 1999·Granted Aug 7, 2001·102 cites·13 claims
- 0393US7737761B2Gate drive circuit with reduced switching loss and noiseHITACHI LTD·Filed 2008·Granted Jun 15, 2010·29 cites·4 claims
- 0493US6304472B1Electric power converting system with integrator providing output indicative of currentHITACHI LTD·Filed 2000·Granted Oct 16, 2001·84 cites·11 claims
- 0590US8471622B2Drive circuit of semiconductor deviceISHIKAWA KATSUMI·Filed 2010·Granted Jun 25, 2013·13 cites·4 claims
- 0690US5859446ADiode and power converting apparatusHITACHI LTD·Filed 1997·Granted Jan 12, 1999·96 cites·12 claims
- 0789US6380796B2Semiconductor power converting apparatusHITACHI LTD·Filed 2001·Granted Apr 30, 2002·60 cites·5 claims
- 0884US6724313B2Fault detection systemHITACHI LTD·Filed 2002·Granted Apr 20, 2004·31 cites·1 claims
- 0981US7880174B2Circuit arrangement having a free-wheel diodeHITACHI LTD·Filed 2008·Granted Feb 1, 2011·10 cites·8 claims
- 1080US7783396B2Hybrid cruising control systemHITACHI LTD·Filed 2008·Granted Aug 24, 2010·13 cites·5 claims
- 1176US6204717B1Semiconductor circuit and semiconductor device for use in equipment such as a power converting apparatusHITACHI LTD·Filed 1996·Granted Mar 20, 2001·28 cites·4 claims
- 1275US6759964B2Fault detection systemHITACHI LTD·Filed 2002·Granted Jul 6, 2004·17 cites·6 claims
- 1375US6414370B1Semiconductor circuit preventing electromagnetic noiseHITACHI LTD·Filed 2000·Granted Jul 2, 2002·15 cites·12 claims
- 1469US7994826B2Drive circuit for power semiconductor switching deviceHITACHI LTD·Filed 2007·Granted Aug 9, 2011·6 cites·8 claims
- 1564US7965056B2Control apparatus of power conversion systemHITACHI LTD·Filed 2008·Granted Jun 21, 2011·6 cites·11 claims
- 1663US7046155B2Fault detection systemHITACHI LTD·Filed 2004·Granted May 16, 2006·8 cites·3 claims
- 1762US5877518ASemiconductor device and inverter apparatus using the semiconductor deviceHITACHI LTD·Filed 1995·Granted Mar 2, 1999·18 cites·14 claims
- 1858US6452261B1Flat semiconductor device and power converter employing the sameHITACHI LTD·Filed 1997·Granted Sep 17, 2002·24 cites·4 claims
- 1956US6600978B2Railway vehicle operation-control system and a railway vehicle using the operation control systemHITACHI LTD·Filed 2001·Granted Jul 29, 2003·13 cites·23 claims
- 2055US8924051B2Drive device for railway vehicleARAKI DAIJIRO·Filed 2011·Granted Dec 30, 2014·3 cites·18 claims
- 2155US6242968B1Semiconductor power converting apparatusHITACHI LTD·Filed 2000·Granted Jun 5, 2001·6 cites·14 claims
- 2254US8963456B2Power converter and power converter of rolling stockSUGIURA TETSU·Filed 2012·Granted Feb 24, 2015·3 cites·1 claims
- 2344US5767555ACompound semiconductor device controlled by MIS gate, driving method therefor and electric power conversion device using the compound semiconductor device and the driving methodHITACHI LTD·Filed 1996·Granted Jun 16, 1998·9 cites·21 claims
- 2444US2009168471A1Circuit device having a free wheeling diode, circuit device and power converter using diodesTSUGAWA DAI·Filed 2008·Application pending·0 cites
- 2540US5962877AInverter apparatus having improved switching elementHITACHI LTD·Filed 1997·Granted Oct 5, 1999·5 cites·8 claims
- 2640US2004056702A1Semiconductor circuit, method of driving the same and semiconductor deviceFiled 2003·Application pending·0 cites
- 2739US2002125548A1Semiconductor circuit, method of driving the same and semiconductor deviceFiled 2002·Application pending·0 cites
- 2838US7577668B2Information transmission system and information transmission methodHITACHI LTD·Filed 2003·Granted Aug 18, 2009·4 cites·8 claims
- 2936US2002145188A1Flat semiconductor device and power converter employing the sameFiled 2002·Application pending·0 cites
- 3034US5831293ASemiconductor thyristor switching device and power converter using sameHITACHI LTD·Filed 1996·Granted Nov 3, 1998·3 cites·14 claims
- 3134US2002062182A1Support system and method for recovering a train, and information transmitting system in a trainFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →