Inventor · disambiguated record
Naoki Ayai
Also filed as: AYAI NAOKI
41 granted patents·12 pending applications·127 citations·filing 1994–2021
96Inventor score
Top patents by PatentIndex Score
53 records- 0191US9748865B2Power conversion device and three-phase alternating current power supply deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2015·Granted Aug 29, 2017·9 cites·9 claims
- 0291US6555504B1Oxide superconducting wire having insulating coat and production method thereofSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Apr 29, 2003·43 cites·23 claims
- 0384US10411501B2Power supply device and switch control method thereforSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Sep 10, 2019·3 cites·10 claims
- 0483US11139657B2Power conversion system and control method thereforSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Oct 5, 2021·4 cites·16 claims
- 0571US10355620B2Conversion deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2014·Granted Jul 16, 2019·3 cites·10 claims
- 0670US9800177B2Conversion deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Oct 24, 2017·2 cites·6 claims
- 0769US6844064B1Method of manufacturing oxide superconducting wire, oxide superconducting wire, superconducting coil and superconducting apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Jan 18, 2005·11 cites·10 claims
- 0864US10461625B2Power conversion device and control method for sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Oct 29, 2019·1 cites·8 claims
- 0964US9627995B2Inverter device with a control unitSUMITOMO ELECTRIC INDUSTRIES·Filed 2014·Granted Apr 18, 2017·2 cites·13 claims
- 1062US10340814B2Gate-blocking a DC/DC converter based upon output current of an AC reactor in a power conversion deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Jul 2, 2019·1 cites·8 claims
- 1161US12463554B2Inverter, parallel inverter system, and method of controlling inverterSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Nov 4, 2025·0 cites·7 claims
- 1261US10348190B2Conversion device for converting voltage in a non-insulated manner and method for controlling the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Jul 9, 2019·1 cites·2 claims
- 1360US7162287B2Oxide high-temperature superconducting wire and method of producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Jan 9, 2007·5 cites·19 claims
- 1458US11876435B2DC/DC conversion system, electricity storage system, and method for controlling DC/DC converterSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Jan 16, 2024·0 cites·9 claims
- 1558US6493925B1Manufacturing method of superconducting wireSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Dec 17, 2002·7 cites·11 claims
- 1657US9722508B2Power conversion device and three-phase alternating current power supply deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2015·Granted Aug 1, 2017·1 cites·19 claims
- 1757US7468207B2Superconducting coil and superconducting apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Granted Dec 23, 2008·1 cites·5 claims
- 1856US5554448AWire for Nb3 X superconducting wireSUMITOMO ELECTRIC INDUSTRIES·Filed 1994·Granted Sep 10, 1996·16 cites·16 claims
- 1953US7091423B2Superconducting cableSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Aug 15, 2006·5 cites·7 claims
- 2052US6546614B2Method of preparing oxide superconducting wireSUMITOMO ELECTRIC INDUSTRIES·Filed 2001·Granted Apr 15, 2003·1 cites·24 claims
- 2151US11217842B2Power storage deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2017·Granted Jan 4, 2022·0 cites·11 claims
- 2249US2009298699A1Process for producing raw material powder for oxide superconductorSUMITOMO ELECTRIC INDUSTRIES·Filed 2008·Application pending·0 cites
- 2347US10355519B2Power supply unit and method for backfeed protection thereofSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Jul 16, 2019·0 cites·18 claims
- 2447US2010075857A1Superconducting tape and production method thereofSUMITOMO ELECTRIC INDUSTRIES·Filed 2008·Application pending·0 cites
- 2546US10284113B2Power conversion device performing DC/AC power conversion via intermediate bus, and control method thereofSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted May 7, 2019·0 cites·15 claims
- 2646US10277036B2Inverter deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2014·Granted Apr 30, 2019·0 cites·20 claims
- 2746US7514388B2Method of producing a material of oxide superconductor, method of producing an oxide superconducting wire, and superconducting apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Granted Apr 7, 2009·0 cites·11 claims
- 2846US2009018023A1Method of manufacturing bismuth-based oxide superconductor and superconducting wireSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Application pending·0 cites
- 2945US9882508B2High-frequency switching type conversion deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2014·Granted Jan 30, 2018·0 cites·11 claims
- 3045US6828508B1Oxide high-temperature superconductor wire and method of producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Dec 7, 2004·1 cites·35 claims
- 3145US2010248969A1Oxide superconducting wire, superconducting structure, method of producing oxide superconducting wire, superconducting cable, superconducting magnet, and product incorporating superconducting magnetSUMITOMO ELECTRIC INDUSTRIES·Filed 2007·Application pending·0 cites
- 3244US10917022B2Power conversion device and control method for power conversion deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2017·Granted Feb 9, 2021·0 cites·6 claims
- 3344US2005278939A1Bismuth oxide superconducting wire rod and process for producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Application pending·0 cites
- 3443US11404974B2Power converter for performing conversion from DC to AC or vice versa, and method for controlling the power converterSUMITOMO ELECTRIC INDUSTRIES·Filed 2019·Granted Aug 2, 2022·0 cites·9 claims
- 3543US11031807B2Power supply device and power supply systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2017·Granted Jun 8, 2021·0 cites·7 claims
- 3643US7132162B2Superconducting coil and superconducting apparatusSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Nov 7, 2006·0 cites·7 claims
- 3743US2003127492A1Oxide superconducting wire having insulating coatSUMITOMO ELECTRIC INDUSTRIES·Filed 2002·Application pending·0 cites
- 3842US10530238B2Power conversion device and method for controlling sameSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Jan 7, 2020·0 cites·7 claims
- 3942US2002045552A1Oxide high-temperature superconducting wire and method of producing the sameFiled 2001·Application pending·0 cites
- 4041US10644614B2Conversion device having a control unit for detecting arm short-circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted May 5, 2020·0 cites·5 claims
- 4139US8238991B2Precursor wire of oxide superconducting wire and production method thereof and oxide superconducting wire produced by using the precursor wireAYAI NAOKI·Filed 2009·Granted Aug 7, 2012·0 cites·14 claims
- 4239US2018262012A1Power conversion device and control method thereofSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Application pending·0 cites
- 4339US2012172230A1Bi2223 OXIDE SUPERCONDUCTOR AND METHOD FOR PRODUCING SAMETATAMIDANI KAZUAKI·Filed 2010·Application pending·0 cites
- 4439US2014373899A1Concentrator photovoltaic system, method for detecting tracking deviation, method for correcting tracking deviation, control device, program for detecting tracking deviation, and, program for correcting tracking deviationSUMITOMO ELECTRIC INDUSTRIES·Filed 2014·Application pending·0 cites
- 4538US10476259B2Power conversion device and method for determining operational state of breaking deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2017·Granted Nov 12, 2019·0 cites·14 claims
- 4637US10193434B2Power conversion device and three-phase AC power supply deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2015·Granted Jan 29, 2019·0 cites·19 claims
- 4737US6777376B1Superconducting wireSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted Aug 17, 2004·0 cites·7 claims
- 4835US9831676B2Power conversion device and three-phase AC power supply deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2015·Granted Nov 28, 2017·0 cites·9 claims
- 4935US7293343B2Method of manufacturing superconducting wireSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Nov 13, 2007·1 cites·10 claims
- 5034US2007287635A1Method for Producing Superconducting WireSUMITOMO ELECTRIC INDUSTRIES·Filed 2005·Application pending·0 cites
Showing the top 50 of 53 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Naoki Ayai 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 →