P

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 patents
US5390061AFeb 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 patents

WESTERN DIGITAL TECH INC

6 patents

Showing the top 50 of 113 patents by PatentIndex Score.