Inventor · disambiguated record
Koichi Yahata
Also filed as: YAHATA KOICHI
17 granted patents·5 pending applications·196 citations·filing 2003–2022
92Inventor score
Files withHITACHI LTD6HITACHI ASTEMO LTD5HITACHI AUTOMOTIVE SYSTEMS LTD4AKAISHI YOSHIO2SHIMANO HIROKI2
Top patents by PatentIndex Score
22 records- 0195US7561448B2Power inverterHITACHI LTD·Filed 2007·Granted Jul 14, 2009·37 cites·4 claims
- 0295US7561429B2Power converter unitHITACHI LTD·Filed 2007·Granted Jul 14, 2009·77 cites·20 claims
- 0391US7719838B2Power inverterHITACHI LTD·Filed 2008·Granted May 18, 2010·28 cites·10 claims
- 0488US8471507B2Electric power conversion system and electric power conversion deviceAKAISHI YOSHIO·Filed 2011·Granted Jun 25, 2013·10 cites·9 claims
- 0585US8228700B2Power conversion deviceYAHATA KOICHI·Filed 2009·Granted Jul 24, 2012·21 cites·7 claims
- 0677US8791681B2Electric power conversion systemAKAISHI YOSHIO·Filed 2010·Granted Jul 29, 2014·6 cites·10 claims
- 0774US9964579B2Voltage detection apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Granted May 8, 2018·2 cites·9 claims
- 0870US8970155B2Power inverterFUNABA SEIJI·Filed 2012·Granted Mar 3, 2015·3 cites·6 claims
- 0963US9065443B2Inverter drive deviceSHIMANO HIROKI·Filed 2012·Granted Jun 23, 2015·2 cites·6 claims
- 1060US11757444B2Semiconductor element drive device and power conversion apparatusHITACHI ASTEMO LTD·Filed 2020·Granted Sep 12, 2023·0 cites·15 claims
- 1160US8040088B2Power inverterHITACHI LTD·Filed 2009·Granted Oct 18, 2011·4 cites·12 claims
- 1253US12512746B2Gate drive circuit and power conversion deviceHITACHI ASTEMO LTD·Filed 2021·Granted Dec 30, 2025·0 cites·6 claims
- 1353US11671089B2Load driverHITACHI ASTEMO LTD·Filed 2020·Granted Jun 6, 2023·0 cites·4 claims
- 1453US7859105B2Power converter, power system provided with same, and mobile bodyHITACHI LTD·Filed 2003·Granted Dec 28, 2010·6 cites·5 claims
- 1549US10840800B2Power conversion deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2017·Granted Nov 17, 2020·0 cites·11 claims
- 1647US12257910B2Power conversion apparatusHITACHI ASTEMO LTD·Filed 2021·Granted Mar 25, 2025·0 cites·4 claims
- 1744US2009002974A1Power Converter UnitHITACHI LTD·Filed 2008·Application pending·0 cites
- 1840US2025079971A1Gate drive circuit and power conversion deviceHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 1937US2019013760A1Direct-current sensor, alternating-current sensor, and inverter having the sameHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Application pending·0 cites
- 2037US2013088279A1Power ConverterSHIMANO HIROKI·Filed 2011·Application pending·0 cites
- 2137US2013033914A1Power Conversion DeviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2011·Application pending·0 cites
- 2229US8971079B2Inverter deviceTATEYAMA TETSURO·Filed 2011·Granted Mar 3, 2015·0 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →