Inventor · disambiguated record
Hisashi Takano
Also filed as: TAKANO HISASHI
112 granted patents·21 pending applications·2,015 citations·filing 1987–2025
99Inventor score
Top patents by PatentIndex Score
133 records- 0198US11532323B1BiSbX (012) layers having increased operating temperatures for SOT and MRAM devicesWESTERN DIGITAL TECH INC·Filed 2021·Granted Dec 20, 2022·21 cites·32 claims
- 0298US11222656B1Method to reduce baseline shift for a SOT differential readerWESTERN DIGITAL TECH INC·Filed 2020·Granted Jan 11, 2022·24 cites·20 claims
- 0398US11100946B1SOT differential reader and method of making sameWESTERN DIGITAL TECH INC·Filed 2020·Granted Aug 24, 2021·23 cites·21 claims
- 0498US11094338B1SOT film stack for differential readerWESTERN DIGITAL TECH INC·Filed 2020·Granted Aug 17, 2021·27 cites·20 claims
- 0598US7502189B2Apparatus, signal-processing circuit and device for magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Mar 10, 2009·156 cites·44 claims
- 0698US5390061AMultilayer magnetoresistance effect-type magnetic headHITACHI LTD·Filed 1991·Granted Feb 14, 1995·156 cites·27 claims
- 0797US6710973B2Single pole type recording head including tapered edgesHITACHI LTD·Filed 2001·Granted Mar 23, 2004·113 cites·13 claims
- 0896US11783853B1Topological insulator based spin torque oscillator readerWESTERN DIGITAL TECH INC·Filed 2022·Granted Oct 10, 2023·5 cites·27 claims
- 0996US7443625B2Magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Oct 28, 2008·29 cites·10 claims
- 1096US7133252B2Single pole type recording head with trailing side tapered edgesHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Nov 7, 2006·51 cites·11 claims
- 1196US5168409AIntegrated magnetic head having a magnetic layer functioning as both a magnetic shield and a magnetic poleHITACHI LTD·Filed 1990·Granted Dec 1, 1992·93 cites·32 claims
- 1296US4881144AThin film magnetic headHITACHI LTD·Filed 1988·Granted Nov 14, 1989·77 cites·12 claims
- 1395US6687099B2Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force differenceHITACHI LTD·Filed 2002·Granted Feb 3, 2004·33 cites·10 claims
- 1495US6404594B1Magnetic disk drive with integrated electrical conductors for recording elementHITACHI LTD·Filed 2000·Granted Jun 11, 2002·55 cites·13 claims
- 1594US11532325B1Two-dimensional magnetic recording (TDMR) for high areal density tape driveWESTERN DIGITAL TECH INC·Filed 2021·Granted Dec 20, 2022·5 cites·20 claims
- 1694US7006326B2Single pole type recording head with tapered edgesHITACHI LTD·Filed 2004·Granted Feb 28, 2006·54 cites·12 claims
- 1794US5850326ANarrow track thin film magnetic head suitable for high density recording and reproducing operations and fabrication method thereof wherein an air bearing surface has at least one groove containing a non-magnetic electrically conductive layerHITACHI LTD·Filed 1994·Granted Dec 15, 1998·45 cites·77 claims
- 1894US5766718ALongitudinal magnetic recording medium and apparatusHITACHI LTD·Filed 1994·Granted Jun 16, 1998·70 cites·28 claims
- 1994US5726837AMultilayer magnetoresistance effect-type magnetic headHITACHI LTD·Filed 1994·Granted Mar 10, 1998·43 cites·24 claims
- 2094US5402295AMagnetic recording head capable of defining narrow track width and magnetic recording apparatus using the sameHITACHI LTD·Filed 1992·Granted Mar 28, 1995·72 cites·15 claims
- 2193US11670329B1Two-dimensional magnetic recording (TDMR) to counter tape dimensional stability (TDS) errors in a tape mediaWESTERN DIGITAL TECH INC·Filed 2021·Granted Jun 6, 2023·4 cites·21 claims
- 2293US11437061B1Read head having one or more antiferromagnetic layers above soft bias side shields, and related methodsWESTERN DIGITAL TECH INC·Filed 2021·Granted Sep 6, 2022·4 cites·11 claims
- 2393US5568331AMethod of head positioning and magnetic recording disk drive using the sameHITACHI LTD·Filed 1990·Granted Oct 22, 1996·67 cites·22 claims
- 2491US6657805B2Method of controlling read write operation of a magnetic disk apparatusHITACHI LTD·Filed 2001·Granted Dec 2, 2003·27 cites·7 claims
- 2591US5325244AMagnetic recording data storage systemHITACHI LTD·Filed 1992·Granted Jun 28, 1994·55 cites·12 claims
- 2689US11763973B2Buffer layers and interlayers that promote BiSbx (012) alloy orientation for SOT and MRAM devicesWESTERN DIGITAL TECH INC·Filed 2021·Granted Sep 19, 2023·1 cites·32 claims
- 2789US6530141B2Method of forming thin film magnetic recording head with narrow track width performing high density recording at high driving frequencyHITACHI LTD·Filed 2001·Granted Mar 11, 2003·24 cites·12 claims
- 2889US6490131B2Thin film magnetic head with electroplated Ni-Fe alloy thin film having small average crystal grain size rangeHITACHI LTD·Filed 2002·Granted Dec 3, 2002·18 cites·4 claims
- 2989US6011674AMagnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositionsHITACHI LTD·Filed 1996·Granted Jan 4, 2000·33 cites·6 claims
- 3088US6894874B2Disk drive having magnetic head conduction paths with arrangements to control impedanceHITACHI LTD·Filed 2003·Granted May 17, 2005·17 cites·10 claims
- 3188US6392849B2Magnetic head with dual spin valve element for differential operationHITACHI LTD·Filed 2001·Granted May 21, 2002·22 cites·14 claims
- 3288US6262867B1Thin film magnetic head with Ni-Fe alloy thin filmHITACHI LTD·Filed 2000·Granted Jul 17, 2001·18 cites·3 claims
- 3387US11646054B2Tape head design having an antiferromagnetic coupling (AFC) null shield for same gap verifyWESTERN DIGITAL TECH INC·Filed 2021·Granted May 9, 2023·2 cites·21 claims
- 3487US6839200B2Combination perpendicular magnetic head having shield material formed at both ends of an upper pole of a write elementHITACHI LTD·Filed 2003·Granted Jan 4, 2005·12 cites·2 claims
- 3587US6538844B2Method of fabricating a magnetic head by focused ion beam etchingHITACHI LTD·Filed 2002·Granted Mar 25, 2003·13 cites·5 claims
- 3686US6483677B2Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effectHITACHI LTD·Filed 2001·Granted Nov 19, 2002·11 cites·6 claims
- 3786US2025366376A1Buffer Layers And Interlayers That Promote BiSbx (012) Alloy Orientation For SOT And MRAM DevicesWESTERN DIGITAL TECH INC·Filed 2025·Application pending·0 cites
- 3885US6657813B2Perpendicular magnetic recording systemHITACHI LTD·Filed 2001·Granted Dec 2, 2003·18 cites·6 claims
- 3985US6118628AThin film magnetic head with Ni-Fe alloy thin filmHITACHI LTD·Filed 1996·Granted Sep 12, 2000·33 cites·15 claims
- 4085US5093822AHigh-density magnetic recording and optical reproducing apparatusHITACHI LTD·Filed 1990·Granted Mar 3, 1992·39 cites·16 claims
- 4184US7817367B2Apparatus, signal-processing circuit and device for magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Oct 19, 2010·4 cites·52 claims
- 4284US7259929B2Device and signal processing circuit for magnetic recording, magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Aug 21, 2007·4 cites·14 claims
- 4384US5126907AThin film magnetic head having at least one magnetic core member made at least partly of a material having a high saturation magnetic flux densityHITACHI LTD·Filed 1990·Granted Jun 30, 1992·38 cites·23 claims
- 4483US12412597B2Non-localized spin valve multi-free-layer reader hybridized with spin orbit torque layersWESTERN DIGITAL TECH INC·Filed 2023·Granted Sep 9, 2025·1 cites·19 claims
- 4583US7436611B2Method of servo writing for magnetic recording system, magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Oct 14, 2008·4 cites·23 claims
- 4683US6912100B2Device and signal processing circuit for magnetic recording, magnetic recording apparatusHITACHI LTD·Filed 2004·Granted Jun 28, 2005·12 cites·26 claims
- 4783US6741412B2Data recording/reproducing signal processing circuit for magnetic recording, and perpendicular magnetic recording/reproducing apparatus using itHITACHI LTD·Filed 2001·Granted May 25, 2004·13 cites·16 claims
- 4882US7075743B2Method of servo writing for magnetic recording system, magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jul 11, 2006·12 cites·25 claims
- 4982US6469873B1Magnetic head and magnetic storage apparatus using the sameHITACHI LTD·Filed 1998·Granted Oct 22, 2002·35 cites·5 claims
- 5081US12394432B2Non-localized spin valve reader hybridized with spin orbit torque layerWESTERN DIGITAL TECH INC·Filed 2023·Granted Aug 19, 2025·1 cites·28 claims
Showing the top 50 of 133 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →