Inventor
TAKANO HISASHI
JP113 patents
⚠️ This page may combine multiple inventors who share the name “TAKANO HISASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
37 patentsUS5390061AFeb 14, 1995
Multilayer magnetoresistance effect-type magnetic head
HITACHI LTD156 citations99
US6710973B2Mar 23, 2004
Single pole type recording head including tapered edges
HITACHI LTD113 citations98
US6687099B2Feb 3, 2004
Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force difference
HITACHI LTD33 citations96
US6404594B1Jun 11, 2002
Magnetic disk drive with integrated electrical conductors for recording element
HITACHI LTD55 citations96
US6011674AJan 4, 2000
Magnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositions
HITACHI LTD33 citations96
US5850326ADec 15, 1998
Narrow 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 layer
HITACHI LTD45 citations96
US5766718AJun 16, 1998
Longitudinal magnetic recording medium and apparatus
HITACHI LTD70 citations96
US5726837AMar 10, 1998
Multilayer magnetoresistance effect-type magnetic head
HITACHI LTD43 citations96
US5568331AOct 22, 1996
Method of head positioning and magnetic recording disk drive using the same
HITACHI LTD67 citations96
US5402295AMar 28, 1995
Magnetic recording head capable of defining narrow track width and magnetic recording apparatus using the same
HITACHI LTD72 citations96
US5325244AJun 28, 1994
Magnetic recording data storage system
HITACHI LTD55 citations96
US5168409ADec 1, 1992
Integrated magnetic head having a magnetic layer functioning as both a magnetic shield and a magnetic pole
HITACHI LTD93 citations96
US4881144ANov 14, 1989
Thin film magnetic head
HITACHI LTD77 citations96
US7006326B2Feb 28, 2006
Single pole type recording head with tapered edges
HITACHI LTD54 citations95
US6118628ASep 12, 2000
Thin film magnetic head with Ni-Fe alloy thin film
HITACHI LTD33 citations95
US6657813B2Dec 2, 2003
Perpendicular magnetic recording system
HITACHI LTD18 citations93
US6327112B1Dec 4, 2001
Adjacent track position detectable information storage apparatus
HITACHI LTD22 citations93
US6104574AAug 15, 2000
Magnetic head with a magnetic pole sandwiched between conductive materials
HITACHI LTD19 citations93
US5093822AMar 3, 1992
High-density magnetic recording and optical reproducing apparatus
HITACHI LTD39 citations93
US6894874B2May 17, 2005
Disk drive having magnetic head conduction paths with arrangements to control impedance
HITACHI LTD17 citations92
US6839200B2Jan 4, 2005
Combination perpendicular magnetic head having shield material formed at both ends of an upper pole of a write element
HITACHI LTD12 citations92
US6741412B2May 25, 2004
Data recording/reproducing signal processing circuit for magnetic recording, and perpendicular magnetic recording/reproducing apparatus using it
HITACHI LTD13 citations92
US6657805B2Dec 2, 2003
Method of controlling read write operation of a magnetic disk apparatus
HITACHI LTD27 citations92
US6538844B2Mar 25, 2003
Method of fabricating a magnetic head by focused ion beam etching
HITACHI LTD13 citations92
US6530141B2Mar 11, 2003
Method of forming thin film magnetic recording head with narrow track width performing high density recording at high driving frequency
HITACHI LTD24 citations92
US6490131B2Dec 3, 2002
Thin film magnetic head with electroplated Ni-Fe alloy thin film having small average crystal grain size range
HITACHI LTD18 citations92
US6469873B1Oct 22, 2002
Magnetic head and magnetic storage apparatus using the same
HITACHI LTD35 citations92
US6392849B2May 21, 2002
Magnetic head with dual spin valve element for differential operation
HITACHI LTD22 citations92
US6310741B1Oct 30, 2001
Magnetic disk apparatus with data track reassigning function
HITACHI LTD19 citations92
US6278593B1Aug 21, 2001
Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect
HITACHI LTD17 citations92
US6262867B1Jul 17, 2001
Thin film magnetic head with Ni-Fe alloy thin film
HITACHI LTD18 citations92
US6091582AJul 18, 2000
Thin film magnetic recording head with very narrow track width performing high density recording at high driving frequency
HITACHI LTD31 citations92
US5126907AJun 30, 1992
Thin film magnetic head having at least one magnetic core member made at least partly of a material having a high saturation magnetic flux density
HITACHI LTD38 citations92
US6912100B2Jun 28, 2005
Device and signal processing circuit for magnetic recording, magnetic recording apparatus
HITACHI LTD12 citations84
US6515817B1Feb 4, 2003
Magnetic disk drive
HITACHI LTD15 citations84
US6483677B2Nov 19, 2002
Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effect
HITACHI LTD11 citations82
US6906889B2Jun 14, 2005
Magnetic disk drive
HITACHI LTD5 citations74
HITACHI GLOBAL STORAGE TECH
7 patentsUS7502189B2Mar 10, 2009
Apparatus, signal-processing circuit and device for magnetic recording system
HITACHI GLOBAL STORAGE TECH156 citations99
US7133252B2Nov 7, 2006
Single pole type recording head with trailing side tapered edges
HITACHI GLOBAL STORAGE TECH51 citations95
US7443625B2Oct 28, 2008
Magnetic disk drive
HITACHI GLOBAL STORAGE TECH29 citations93
US7075743B2Jul 11, 2006
Method of servo writing for magnetic recording system, magnetic recording system
HITACHI GLOBAL STORAGE TECH12 citations84
US7292417B2Nov 6, 2007
Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect
HITACHI GLOBAL STORAGE TECH3 citations74
US7054120B2May 30, 2006
Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect
HITACHI GLOBAL STORAGE TECH7 citations74
US6717760B2Apr 6, 2004
Magnetic disk drive
HITACHI GLOBAL STORAGE TECH6 citations74
WESTERN DIGITAL TECH INC
6 patentsUS11222656B1Jan 11, 2022
Method to reduce baseline shift for a SOT differential reader
WESTERN DIGITAL TECH INC24 citations95
US11532323B1Dec 20, 2022
BiSbX (012) layers having increased operating temperatures for SOT and MRAM devices
WESTERN DIGITAL TECH INC21 citations94
US11100946B1Aug 24, 2021
SOT differential reader and method of making same
WESTERN DIGITAL TECH INC23 citations94
US11094338B1Aug 17, 2021
SOT film stack for differential reader
WESTERN DIGITAL TECH INC27 citations94
US11783853B1Oct 10, 2023
Topological insulator based spin torque oscillator reader
WESTERN DIGITAL TECH INC5 citations86
US11670329B1Jun 6, 2023
Two-dimensional magnetic recording (TDMR) to counter tape dimensional stability (TDS) errors in a tape media
WESTERN DIGITAL TECH INC4 citations75
Showing the top 50 of 113 patents by PatentIndex Score.