Inventor · disambiguated record
Kei Hirata
Also filed as: HIRATA KEI
114 granted patents·12 pending applications·539 citations·filing 1994–2024
99Inventor score
Top patents by PatentIndex Score
126 records- 0195US8675457B1Near-field light generator including a plasmon generator and a waveguideTDK CORP·Filed 2012·Granted Mar 18, 2014·29 cites·10 claims
- 0294US10227481B2Rubber composition, vulcanized rubber, and tireKURARAY CO·Filed 2014·Granted Mar 12, 2019·11 cites·11 claims
- 0393US8300359B2Perpendicular magnetic recording head and magnetic recording deviceHIRATA KEI·Filed 2009·Granted Oct 30, 2012·16 cites·14 claims
- 0493US8170447B2Image forming apparatus, developing apparatus and contact-retracting methodKUBO KEISUKE·Filed 2008·Granted May 1, 2012·25 cites·11 claims
- 0592US8811127B1Magnetic head comprising recording part, reading part, heater for expansion of the recording part, and heater for expansion of the reading partTDK CORP·Filed 2013·Granted Aug 19, 2014·17 cites·11 claims
- 0692US7715156B2Tunnel magnetoresistive effect element and thin-film magnetic head with tunnel magnetoresistive effect read head elementTDK CORP·Filed 2007·Granted May 11, 2010·24 cites·29 claims
- 0791US10522178B1High damping shield with low magnetic moment in perpendicular magnetic recording (PMR) writerHEADWAY TECH INC·Filed 2018·Granted Dec 31, 2019·12 cites·13 claims
- 0891US9640205B1Magnetic recording-reproducing head having different sections with different functions including an erase functionTDK CORP·Filed 2016·Granted May 2, 2017·11 cites·9 claims
- 0991US7835672B2Developing device, image carrier unit and image forming apparatusFUJI XEROX CO LTD·Filed 2008·Granted Nov 16, 2010·12 cites·19 claims
- 1091US7672085B2CPP type magneto-resistive effect device having a semiconductor oxide spacer layer and magnetic disk systemTDK CORP·Filed 2007·Granted Mar 2, 2010·11 cites·19 claims
- 1190US8588040B1Thermally assisted magnetic head slider, head gimbal assembly, and hard disk drive with the same, and manufacturing method thereofSAE MAGNETICS HK LTD·Filed 2012·Granted Nov 19, 2013·18 cites·30 claims
- 1290US8164853B2Perpendicular magnetic write head with side shield saturation magnetic flux density increasing away from magnetic poleHIRATA KEI·Filed 2010·Granted Apr 24, 2012·14 cites·8 claims
- 1390US8000063B2Magneto-resistive element, thin film magnetic head, magnetic head device, and magnetic recording/reproducing apparatusTDK CORP·Filed 2007·Granted Aug 16, 2011·10 cites·30 claims
- 1490US7672092B2Method for manufacturing magnetic field detecting element, utilizing diffusion of metalTDK CORP·Filed 2007·Granted Mar 2, 2010·10 cites·14 claims
- 1589US9228077B2Rubber composition and tireKURARAY CO·Filed 2013·Granted Jan 5, 2016·4 cites·16 claims
- 1689US8861318B1Thermally assisted magnetic write head, and method of manufacturing the sameSAE MAGNETICS HK LTD·Filed 2013·Granted Oct 14, 2014·13 cites·16 claims
- 1789US8817418B1Magnetic head for perpendicular magnetic recording having a write shieldTDK CORP·Filed 2013·Granted Aug 26, 2014·11 cites·19 claims
- 1889US8462594B1Thermally-assisted magnetic recording head capable of preventing propagated light being absorbed by magnetic poleAOKI SUSUMU·Filed 2012·Granted Jun 11, 2013·15 cites·17 claims
- 1989US7843668B2Magnetoresistive element including two ferromagnetic layersTDK CORP·Filed 2007·Granted Nov 30, 2010·9 cites·11 claims
- 2089US7782575B2Magnetoresistive element having free layer, pinned layer, and spacer layer disposed therebetween, the spacer layer including semiconductor layerTDK CORP·Filed 2007·Granted Aug 24, 2010·15 cites·11 claims
- 2187US10370525B2Rubber compositionsKURARAY CO·Filed 2015·Granted Aug 6, 2019·2 cites·22 claims
- 2287US7663845B2Current-perpendicular-to-plane magneto-resistive element including multilayer lower magnetic shielding filmTDK CORP·Filed 2006·Granted Feb 16, 2010·7 cites·12 claims
- 2386US8325570B1Thermally-assisted magnetic recording head including a protruding memberTANAKA KOSUKE·Filed 2012·Granted Dec 4, 2012·10 cites·12 claims
- 2486US7558027B2Magnetic field sensor provided with an upper shield layer having portions with different magnetostrictionTDK CORP·Filed 2006·Granted Jul 7, 2009·7 cites·11 claims
- 2585US8472137B2Magnetic head and method of manufacture thereof wherein the head includes a pole layer and non-magnetic layer having a continuous tapered face opposed to a trailing shieldHIRATA KEI·Filed 2010·Granted Jun 25, 2013·9 cites·14 claims
- 2685US7948713B2Magnetic head slider using giant magnetostrictive materialTDK CORP·Filed 2007·Granted May 24, 2011·6 cites·5 claims
- 2785US7542233B2Perpendicular magnetic recording element, thin film magnetic head, magnetic head device, and magnetic recording/reproducing apparatus for reducing deleterious effects of external magnetic fieldsTDK CORP·Filed 2006·Granted Jun 2, 2009·6 cites·7 claims
- 2884US10490210B1Optimization of high damping shield geometry in perpendicular magnetic recording (PMR) writerHEADWAY TECH INC·Filed 2019·Granted Nov 26, 2019·6 cites·29 claims
- 2984US7693477B2Image forming member, toner removing apparatus, developing apparatus, and image forming apparatusFUJI XEROX CO LTD·Filed 2007·Granted Apr 6, 2010·8 cites·8 claims
- 3083US12073857B1Perpendicular magnetic recording head equipping a spin torque oscillator element with an electric current in side gapsHEADWAY TECH INC·Filed 2023·Granted Aug 27, 2024·1 cites·12 claims
- 3183US10339964B1Perpendicular magnetic recording (PMR) write head with patterned high moment trailing shieldHEADWAY TECH INC·Filed 2018·Granted Jul 2, 2019·6 cites·29 claims
- 3283US8785542B2Rubber composition and tireKURARAY CO·Filed 2012·Granted Jul 22, 2014·4 cites·10 claims
- 3383US5752141ARotating type developing apparatusFUJI XEROX CO LTD·Filed 1997·Granted May 12, 1998·36 cites·15 claims
- 3482US8233237B2Perpendicular magnetic write head and magnetic recording deviceANAGAWA KENKICHI·Filed 2010·Granted Jul 31, 2012·7 cites·6 claims
- 3582US8160481B2Storage container, supply device, and image forming apparatusKITAGAWA HIROAKI·Filed 2009·Granted Apr 17, 2012·8 cites·10 claims
- 3681US7920362B2Magnetio-resistive device including a multi-layer spacer which includes a semiconductor oxide layerTDK CORP·Filed 2007·Granted Apr 5, 2011·4 cites·16 claims
- 3781US7885042B2CPP magneto-resistive effect device utilizing an anti-oxidizing layer as part of the spacer layer in a thin-film magnetic head usable in a head gimbal assembly in a hard disk systemTDK CORP·Filed 2007·Granted Feb 8, 2011·4 cites·12 claims
- 3881US7764470B2Magneto-resistance effect element and thin-film magnetic head having non-magnetic spacer layer composed of one semiconductor layer and two metal layersTDK CORP·Filed 2007·Granted Jul 27, 2010·4 cites·7 claims
- 3980US10839829B1Magnetic head with a main pole including first and second layers and manufacturing method for the sameSASAKI YOSHITAKA·Filed 2019·Granted Nov 17, 2020·4 cites·18 claims
- 4079US10297277B1Magnetic head including a coil and a magnetic path forming sectionSASAKI YOSHITAKA·Filed 2018·Granted May 21, 2019·4 cites·11 claims
- 4179US8254215B1Thermally-assisted magnetic recording headTANAKA KOSUKE·Filed 2011·Granted Aug 28, 2012·5 cites·11 claims
- 4278US8964514B2Plasmon generator and thermally-assisted magnetic recording head having the sameHIRATA KEI·Filed 2012·Granted Feb 24, 2015·4 cites·14 claims
- 4378US8559123B2Magnetic recording device, magnetic recording method and magnetic recording medium for shingle write schemeHIRATA KEI·Filed 2010·Granted Oct 15, 2013·4 cites·12 claims
- 4478US8213841B2Container and deviceKITAGAWA HIROAKI·Filed 2009·Granted Jul 3, 2012·6 cites·9 claims
- 4578US8072706B2Magnetic head for perpendicular magnetic recording and method of manufacturing sameHIRATA KEI·Filed 2009·Granted Dec 6, 2011·4 cites·24 claims
- 4678US8000066B2Hard disk system incorporating a current perpendicular to plane magneto-resistive effect device with a spacer layer in the thickness range showing conduction performance halfway between OHMIC conduction and semi-conductive conductionTDK CORP·Filed 2007·Granted Aug 16, 2011·8 cites·22 claims
- 4777US7463449B2Magnetic head for perpendicular magnetic recording, head gimbal assembly, head arm assembly and magnetic disk driveTDK CORP·Filed 2005·Granted Dec 9, 2008·3 cites·9 claims
- 4877US2025105384A1Systems, Methods, and Devices for Battery State MonitoringTDK CORP·Filed 2024·Application pending·0 cites
- 4976US9850336B2Copolymer, rubber composition using same, and tireKURARAY CO·Filed 2013·Granted Dec 26, 2017·1 cites·17 claims
- 5076US7843667B2Thin film magnetic head, head gimbal assembly, head arm assembly and magnetic disk deviceTDK CORP·Filed 2007·Granted Nov 30, 2010·3 cites·12 claims
Showing the top 50 of 126 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →