Inventor · disambiguated record
Tsutomu Chou
Also filed as: CHOU TSUTOMU
95 granted patents·18 pending applications·902 citations·filing 1994–2025
99Inventor score
Top patents by PatentIndex Score
113 records- 0197US9852752B1Plasmon generator with metallic waveguide blocker for TAMRHEADWAY TECH INC·Filed 2016·Granted Dec 26, 2017·45 cites·12 claims
- 0297US8325567B2Thermally-assisted magnetic recording head comprising near-field light generatorMIYAUCHI DAISUKE·Filed 2009·Granted Dec 4, 2012·38 cites·20 claims
- 0396US8098547B2Optical waveguide and thermal assist magnetic recording head therewithKOMURA EIJI·Filed 2010·Granted Jan 17, 2012·31 cites·11 claims
- 0496US7876534B2Magneto-resistive effect device of the CPP type, and magnetic disk systemTDK CORP·Filed 2008·Granted Jan 25, 2011·28 cites·11 claims
- 0596US6791445B2Coil-embedded dust core and method for manufacturing the sameTDK CORP·Filed 2002·Granted Sep 14, 2004·64 cites·11 claims
- 0695US8264919B2Thermal assisted magnetic recording head having spot size converterKOMURA EIJI·Filed 2010·Granted Sep 11, 2012·26 cites·10 claims
- 0795US8223597B2Thermally assisted head having reflection mirror for propagating lightKOMURA EIJI·Filed 2010·Granted Jul 17, 2012·32 cites·11 claims
- 0894US8170389B1Optical waveguide, and thermally-assisted magnetic recording head including the sameKOMURA EIJI·Filed 2011·Granted May 1, 2012·26 cites·11 claims
- 0994US8014108B2Magnetoresistive device of the CPP type, utilizing insulating layers interposed in shield layers to form a closed magnetic path usable in a disk systemTDK CORP·Filed 2008·Granted Sep 6, 2011·19 cites·19 claims
- 1092US8270791B2Optical waveguide and thermally-assisted magnetic recording head therewithKOMURA EIJI·Filed 2010·Granted Sep 18, 2012·18 cites·3 claims
- 1192US8169731B2Near-field light transducer comprising propagation edge with predetermined curvature radiusMIZUNO TOMOHITO·Filed 2009·Granted May 1, 2012·15 cites·12 claims
- 1292US8049997B2Magnetoresistive element including a pair of free layers coupled to a pair of shield layersTDK CORP·Filed 2008·Granted Nov 1, 2011·22 cites·14 claims
- 1391US8194509B2Thermally-assisted magnetic recording head comprising light source with photonic-band layerSHIMAZAWA KOJI·Filed 2009·Granted Jun 5, 2012·11 cites·23 claims
- 1491US7826179B2Magneto-resistive effect device of the CPP structure and magnetic disk systemTDK CORP·Filed 2007·Granted Nov 2, 2010·11 cites·10 claims
- 1590US8358565B2Thermally-assisted magnetic recording head having dummy waveguides for light beam alignmentTDK CORP·Filed 2010·Granted Jan 22, 2013·13 cites·8 claims
- 1690US7881023B2Magnetoresistive device of the CPP type, and magnetic disk systemTDK CORP·Filed 2008·Granted Feb 1, 2011·10 cites·17 claims
- 1790US6759935B2Coil-embedded dust core production process, and coil-embedded dust core formed by the production processTDK CORP·Filed 2001·Granted Jul 6, 2004·58 cites·16 claims
- 1889US8750082B1Thermally-assisted magnetic recording head having gap layers between magnetic pole and plasmon generatorTDK CORP·Filed 2013·Granted Jun 10, 2014·10 cites·15 claims
- 1989US8351308B2Thermally assisted magnetic recording head having V-shaped plasmon generatorTDK CORP·Filed 2010·Granted Jan 8, 2013·11 cites·13 claims
- 2089US8130599B2Thermally-assisted magnetic recording head comprising near-field optical device with propagation edgeKOMURA EIJI·Filed 2009·Granted Mar 6, 2012·8 cites·16 claims
- 2188US8547805B1Thermally-assisted magnetic recording head having temperature sensor embedded on dielectric waveguideKOMURA EIJI·Filed 2012·Granted Oct 1, 2013·10 cites·10 claims
- 2287US8341825B2Method for manufacturing a thermally-assisted magnetic headTDK CORP·Filed 2010·Granted Jan 1, 2013·10 cites·6 claims
- 2386US12444436B1Parabolic shaped plasmonic waveguide blocker for heat assisted recording headHEADWAY TECH INC·Filed 2024·Granted Oct 14, 2025·1 cites·14 claims
- 2486US10332553B1Double ridge near-field transducersHEADWAY TECH INC·Filed 2017·Granted Jun 25, 2019·7 cites·29 claims
- 2586US8369192B1Thermally-assisted magnetic recording head, head gimbal assembly and magnetic recording deviceTDK CORP·Filed 2011·Granted Feb 5, 2013·8 cites·14 claims
- 2686US8208349B2Thermally-assisted magnetic recording head having a gap between propagation edge and magnetic poleTANAKA KOSUKE·Filed 2010·Granted Jun 26, 2012·9 cites·14 claims
- 2786US8169861B1Thermally-assisted magnetic recording head comprising plasmon generatorKOMURA EIJI·Filed 2010·Granted May 1, 2012·8 cites·18 claims
- 2886US8147994B2Layered structure having FePt system magnetic layer and magnetoresistive effect element using the sameMATSUZAWA HIRONOBU·Filed 2009·Granted Apr 3, 2012·7 cites·13 claims
- 2986US8077558B1Thermally-assisted magnetic recording head including plasmon generatorTSUTSUMI TAKESHI·Filed 2010·Granted Dec 13, 2011·16 cites·14 claims
- 3085US10043542B2Plasmon generator with separating layer for thermal assisted magnetic recording headTDK CORP·Filed 2016·Granted Aug 7, 2018·7 cites·17 claims
- 3185US8462593B1Thermal-assisted magnetic recording head having dielectric waveguide, metal waveguide and near-field light generating elementKOMURA EIJI·Filed 2012·Granted Jun 11, 2013·7 cites·17 claims
- 3285US8295003B2Thermal assisted head using curved wave guideCHOU TSUTOMU·Filed 2010·Granted Oct 23, 2012·8 cites·15 claims
- 3385US7876535B2Magnetoresistive device of the CPP type, and magnetic disk systemTDK CORP·Filed 2008·Granted Jan 25, 2011·6 cites·13 claims
- 3484US8243559B2Thermally-assisted magnetic recording head comprising near-field optical device with propagation edgeKOMURA EIJI·Filed 2009·Granted Aug 14, 2012·5 cites·16 claims
- 3584US8223596B2Thermally-assisted magnetic recording head with plane-emission type light sourceCHOU TSUTOMU·Filed 2009·Granted Jul 17, 2012·5 cites·13 claims
- 3684US8125858B2Heat-assisted magnetic recording head including plasmon generatorHARA SHINJI·Filed 2010·Granted Feb 28, 2012·8 cites·16 claims
- 3784US8089831B2Heat-assisted magnetic recording head including plasmon generatorCHOU TSUTOMU·Filed 2010·Granted Jan 3, 2012·7 cites·11 claims
- 3883US8760979B1Thermally-assisted magnetic recording head having gap layers between magnetic pole and plasmon generatorTDK CORP·Filed 2013·Granted Jun 24, 2014·8 cites·14 claims
- 3983US8432645B2Magneto-resistive effect element, magnetic head, magnetic head slider, head gimbal assembly and hard disk drive apparatusMATSUZAWA HIRONOBU·Filed 2011·Granted Apr 30, 2013·8 cites·20 claims
- 4083US8315129B1Thermally-assisted magnetic recording head, head gimbal assembly and magnetic recording deviceKOMURA EIJI·Filed 2011·Granted Nov 20, 2012·6 cites·11 claims
- 4183US8023230B2Magnetoresistive element including a pair of ferromagnetic layers coupled to a pair of shield layersTDK CORP·Filed 2008·Granted Sep 20, 2011·5 cites·9 claims
- 4282US8374063B2Heat-assisted magnetic write head, head gimbals assembly, head arm assembly, and magnetic disk deviceTDK CORP·Filed 2011·Granted Feb 12, 2013·6 cites·8 claims
- 4382US8264920B1Near-field light generator and thermally-assisted magnetic recording headCHOU TSUTOMU·Filed 2011·Granted Sep 11, 2012·6 cites·8 claims
- 4482US8189303B2Thin film magnetic head having a pair of magnetic layers whose magnetization is controlled by shield layersHARA SHINJI·Filed 2008·Granted May 29, 2012·11 cites·20 claims
- 4582US8094420B2Magnetoresistive device of the CCP (current perpendicular to plane) type with single-domain control of magnetization, and associated magnetic disk systemAYUKAWA TOSHIYUKI·Filed 2008·Granted Jan 10, 2012·6 cites·25 claims
- 4682US6940387B2Coil-embedded dust core and method for manufacturing the sameTDK CORP·Filed 2004·Granted Sep 6, 2005·16 cites·6 claims
- 4781US8427927B1Thermally-assisted magnetic recording head, head gimbals assembly, head arm assembly, and magnetic disk unitCHOU TSUTOMU·Filed 2012·Granted Apr 23, 2013·5 cites·14 claims
- 4881US8331063B2Magnetoresistive effect element in CPP-type structure and magnetic disk deviceHARA SHINJI·Filed 2009·Granted Dec 11, 2012·4 cites·13 claims
- 4981US2025372121A1Parabolic Shaped Plasmonic Waveguide Blocker For Heat Assisted Recording HeadHEADWAY TECH INC·Filed 2025·Application pending·0 cites
- 5080US8125857B2Heat-assisted magnetic recording head including plasmon generatorTANAKA KOSUKE·Filed 2010·Granted Feb 28, 2012·5 cites·9 claims
Showing the top 50 of 113 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →