Inventor · disambiguated record
Koichi Hirota
Also filed as: HIROTA KOICHI
83 granted patents·19 pending applications·579 citations·filing 1985–2024
99Inventor score
Files withSHINETSU CHEMICAL CO43AISIN SEIKI25NIPPON CATALYTIC CHEM IND10NAKAMURA HAJIME4HIROTA KOICHI3
Top patents by PatentIndex Score
102 records- 0197US9892831B2R-Fe—B sintered magnet and making methodSHINETSU CHEMICAL CO·Filed 2016·Granted Feb 13, 2018·11 cites·10 claims
- 0295US7559996B2Rare earth permanent magnet, making method, and permanent magnet rotary machineSHINETSU CHEMICAL CO·Filed 2006·Granted Jul 14, 2009·36 cites·17 claims
- 0394US10410775B2R—Fe—B sintered magnet and making methodSHINETSU CHEMICAL CO·Filed 2016·Granted Sep 10, 2019·7 cites·8 claims
- 0494US8377233B2Preparation of rare earth permanent magnet materialSHINETSU CHEMICAL CO·Filed 2011·Granted Feb 19, 2013·12 cites·16 claims
- 0592US8983736B2Grille shutter control deviceHIROTA KOICHI·Filed 2012·Granted Mar 17, 2015·17 cites·8 claims
- 0692US8231740B2Method for preparing rare earth permanent magnet materialNAKAMURA HAJIME·Filed 2007·Granted Jul 31, 2012·10 cites·20 claims
- 0791US6960240B2Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnetSHINETSU CHEMICAL CO·Filed 2002·Granted Nov 1, 2005·34 cites·12 claims
- 0888US10937578B2Method for preparing R—Fe—B sintered magnetSHINETSU CHEMICAL CO·Filed 2017·Granted Mar 2, 2021·3 cites·26 claims
- 0988US8269392B2Rotor for permanent magnet rotary machineDOI YUHITO·Filed 2010·Granted Sep 18, 2012·8 cites·8 claims
- 1088US7531933B2Permanent magnet rotating machineSHINETSU CHEMICAL CO·Filed 2007·Granted May 12, 2009·16 cites·5 claims
- 1186US12172211B2Method for producing magnetic refrigeration material, and magnetic refrigeration materialSHINETSU CHEMICAL CO·Filed 2023·Granted Dec 24, 2024·0 cites·5 claims
- 1286US7770967B2Head rest deviceAISIN SEIKI·Filed 2006·Granted Aug 10, 2010·25 cites·8 claims
- 1386US7485193B2R-FE-B based rare earth permanent magnet materialSHINETSU CHEMICAL CO·Filed 2005·Granted Feb 3, 2009·13 cites·6 claims
- 1485US8823235B2Rotor for axial gap-type permanent magnetic rotating machineWATANABE NAOKI·Filed 2010·Granted Sep 2, 2014·6 cites·12 claims
- 1585US8012269B2Nd-Fe-B rare earth permanent magnet materialSHINETSU CHEMICAL CO·Filed 2005·Granted Sep 6, 2011·5 cites·11 claims
- 1684US10074477B2Rare earth sintered magnet and making methodSHINETSU CHEMICAL CO·Filed 2016·Granted Sep 11, 2018·1 cites·8 claims
- 1783US8211327B2Preparation of rare earth permanent magnet materialNAKAMURA HAJIME·Filed 2005·Granted Jul 3, 2012·6 cites·12 claims
- 1883US8075707B2Method for preparing rare earth permanent magnet materialNAKAMURA HAJIME·Filed 2007·Granted Dec 13, 2011·7 cites·23 claims
- 1983US7488393B2Rare earth permanent magnetSHINETSU CHEMICAL CO·Filed 2006·Granted Feb 10, 2009·7 cites·5 claims
- 2082US9156439B2Automatic opening and closing apparatus of opening and closing member for vehicle and structural member included in vehicleAISIN SEIKI·Filed 2013·Granted Oct 13, 2015·8 cites·14 claims
- 2182US8756793B2Method for assembling rotor for use in IPM rotary machineDOI YUHITO·Filed 2010·Granted Jun 24, 2014·6 cites·7 claims
- 2281US10515747B2R-Fe-B sintered magnet and making methodSHINETSU CHEMICAL CO·Filed 2016·Granted Dec 24, 2019·2 cites·8 claims
- 2381US7204891B2Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnetSHINETSU CHEMICAL CO·Filed 2005·Granted Apr 17, 2007·8 cites·6 claims
- 2481US7029054B2Outside handle deviceAISIN SEIKI·Filed 2004·Granted Apr 18, 2006·31 cites·8 claims
- 2580US7488394B2Rare earth permanent magnetSHINETSU CHEMICAL CO·Filed 2006·Granted Feb 10, 2009·3 cites·6 claims
- 2680US6322637B1Thin ribbon of rare earth-based permanent magnet alloySHINETSU CHEMICAL CO·Filed 2000·Granted Nov 27, 2001·16 cites·2 claims
- 2779US11806782B2Method for producing magnetic refrigeration material, and magnetic refrigeration materialSHINETSU CHEMICAL CO·Filed 2023·Granted Nov 7, 2023·0 cites·4 claims
- 2879US6319335B1Quenched thin ribbon of rare earth/iron/boron-based magnet alloySHINETSU CHEMICAL CO·Filed 2000·Granted Nov 20, 2001·16 cites·5 claims
- 2978US7955443B2Method for preparing rare earth permanent magnet materialSHINETSU CHEMICAL CO·Filed 2007·Granted Jun 7, 2011·8 cites·24 claims
- 3078US4769492AMethod for production of 2,3,4,5-tetrafluorobenzoic acidNIPPON CATALYTIC CHEM IND·Filed 1986·Granted Sep 6, 1988·15 cites·21 claims
- 3177US7488395B2Functionally graded rare earth permanent magnetSHINETSU CHEMICAL CO·Filed 2006·Granted Feb 10, 2009·8 cites·8 claims
- 3276US11613196B2Ramp system for vehicleTOYOTA MOTOR CO LTD·Filed 2021·Granted Mar 28, 2023·1 cites·18 claims
- 3375US9742248B2Method for assembling rotor for use in IPM rotary machineSHINETSU CHEMICAL CO·Filed 2014·Granted Aug 22, 2017·2 cites·14 claims
- 3474US10573438B2R-(Fe, Co)-B sintered magnet and making methodSHINETSU CHEMICAL CO·Filed 2016·Granted Feb 25, 2020·1 cites·9 claims
- 3574US7988795B2R-T-B—C rare earth sintered magnet and making methodSHINETSU CHEMICAL CO·Filed 2006·Granted Aug 2, 2011·6 cites·9 claims
- 3673US8496219B2Seat sliding apparatus for a vehicleOKADA TAKASHI·Filed 2010·Granted Jul 30, 2013·7 cites·4 claims
- 3771US11410805B2R-Fe-B sintered magnetSHINETSU CHEMICAL CO·Filed 2020·Granted Aug 9, 2022·0 cites·8 claims
- 3871US7031814B2Occupant protection apparatus for vehicleAISIN SEIKI·Filed 2005·Granted Apr 18, 2006·13 cites·20 claims
- 3969US6419723B2Thin ribbon of rare earth-based permanent magnet alloySHINETSU CHEMICAL CO·Filed 2001·Granted Jul 16, 2002·9 cites·3 claims
- 4069US5144066AMethod of producing naphthalenedicarboxylic acids and diaryldicarboxylic acidsNIPPON CATALYTIC CHEM IND·Filed 1991·Granted Sep 1, 1992·12 cites·24 claims
- 4168US8562034B2Opening-and-closing member drive control apparatus for vehicleHIROTA KOICHI·Filed 2010·Granted Oct 22, 2013·7 cites·5 claims
- 4268US8478491B2Seat control device, method, and programMIYAJIMA TAKAYUKI·Filed 2010·Granted Jul 2, 2013·5 cites·13 claims
- 4367US9953750B2Nd based sintered magnetSHINETSU CHEMICAL CO·Filed 2014·Granted Apr 24, 2018·1 cites·2 claims
- 4466US7568544B2Occupant protection device for vehicleAISIN SEIKI·Filed 2005·Granted Aug 4, 2009·5 cites·15 claims
- 4566US7520941B2Functionally graded rare earth permanent magnetSHINETSU CHEMICAL CO·Filed 2006·Granted Apr 21, 2009·1 cites·5 claims
- 4666US7140653B2Outside handle apparatus and connector mechanismAISIN SEIKI·Filed 2004·Granted Nov 28, 2006·20 cites·9 claims
- 4766US6445147B1Movable body control system for vehicleAISIN SEIKI·Filed 2000·Granted Sep 3, 2002·14 cites·5 claims
- 4865US12441623B2Zirconium oxide nanoparticles, dispersion liquid and resin compositionNIPPON CATALYTIC CHEM IND·Filed 2020·Granted Oct 14, 2025·0 cites·8 claims
- 4965US8695210B2Method of manufacturing an Nd based sintered magnetMIYATA KOJI·Filed 2009·Granted Apr 15, 2014·3 cites·2 claims
- 5065US6998969B2Door lock apparatus for vehicleAISIN SEIKI·Filed 2003·Granted Feb 14, 2006·11 cites·18 claims
Showing the top 50 of 102 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →