Inventor
MATSUDA YOSHIBUMI
JP48 patents
⚠️ This page may combine multiple inventors who share the name “MATSUDA YOSHIBUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
42 patentsUS5851643ADec 22, 1998
Magnetic recording media and magnetic recording read-back system which uses such media
HITACHI LTD192 citations99
US5390061AFeb 14, 1995
Multilayer magnetoresistance effect-type magnetic head
HITACHI LTD156 citations99
US6687099B2Feb 3, 2004
Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force difference
HITACHI LTD33 citations96
US6011674AJan 4, 2000
Magnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositions
HITACHI LTD33 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
US5536585AJul 16, 1996
Magnetic recording medium and fabrication method therefor
HITACHI LTD37 citations96
US5325244AJun 28, 1994
Magnetic recording data storage system
HITACHI LTD55 citations96
US5147732ASep 15, 1992
Longitudinal magnetic recording media and magnetic memory units
HITACHI LTD96 citations96
US5143794ASep 1, 1992
Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus
HITACHI LTD49 citations96
US4833020AMay 23, 1989
Magnetic recording medium
HITACHI LTD77 citations96
US5236791AAug 17, 1993
Magnetic recording medium and magnetic storage
HITACHI LTD58 citations95
US5685958ANov 11, 1997
Method of fabricating a magnetic recording medium
HITACHI LTD23 citations93
US5372843ADec 13, 1994
Process for producing a magnetic recording medium using a patterned diffusion barrier
HITACHI LTD23 citations93
US5093822AMar 3, 1992
High-density magnetic recording and optical reproducing apparatus
HITACHI LTD39 citations93
US6403240B1Jun 11, 2002
Magnetic recording media and magnetic recording system using the same
HITACHI LTD35 citations92
US6372367B1Apr 16, 2002
Magnetic recording medium, method for producing the same and magnetic recording apparatus using the same
HITACHI LTD20 citations92
US6335103B1Jan 1, 2002
Magnetic recording media for longitudinal recording
HITACHI LTD21 citations92
US6278593B1Aug 21, 2001
Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect
HITACHI LTD17 citations92
US5665478ASep 9, 1997
Magnetic recording media for longitudinal recording
HITACHI LTD32 citations92
US4883711ANov 28, 1989
Magnetic recording medium
HITACHI LTD30 citations92
US6623874B2Sep 23, 2003
Magnetic recording medium and magnetic recording apparatus
HITACHI LTD20 citations91
US6627253B2Sep 30, 2003
Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus
HITACHI LTD16 citations84
US6544667B1Apr 8, 2003
Magnetic recording medium, producing method of the same and magnetic recording system
HITACHI LTD17 citations84
US6483677B2Nov 19, 2002
Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effect
HITACHI LTD11 citations82
US5599580AFeb 4, 1997
Method of fabricating a magnetic recording medium
HITACHI LTD17 citations82
US6613428B2Sep 2, 2003
Magnetic recording medium and magnetic recording and reproducing apparatus wherein the magnetic layer has a fluctuation of field; A or Hf of not less than 30 Oersteds
HITACHI LTD4 citations74
US6356406B1Mar 12, 2002
Magnetic storage system
HITACHI LTD13 citations74
US6310748B1Oct 30, 2001
Magnetic thin film magnetic recording medium
HITACHI LTD5 citations74
US6197367B1Mar 6, 2001
Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storage
HITACHI LTD13 citations74
US5736235AApr 7, 1998
Magnetic recording medium having at least two magnetic layers with easy axes oriented in the same direction
HITACHI LTD16 citations74
US6596420B2Jul 22, 2003
Magnetic recording media and magnetic recording system using the same
HITACHI LTD12 citations73
US5572379ANov 5, 1996
Magnetic recording drive having arrangements for average useful life of magnetorestive effects sensors
HITACHI LTD6 citations73
US5906884AMay 25, 1999
Magnetic recording medium
HITACHI LTD13 citations72
US6846577B2Jan 25, 2005
Magnetic recording medium possessing a fluctuation field of not less than 30 Oe
HITACHI LTD2 citations63
US6623873B1Sep 23, 2003
Magnetic recording medium and magnetic disk apparatus using the same
HITACHI LTD4 citations63
US4939045AJul 3, 1990
Magnetic recording medium
HITACHI LTD5 citations62
US7005202B2Feb 28, 2006
Magnetic recording medium and magnetic recording apparatus
HITACHI LTD3 citations61
US6703148B2Mar 9, 2004
Magnetic recording medium and magnetic disk apparatus using the same
HITACHI LTD0 citations52
US6069762AMay 30, 2000
Magnetic recording drive having arrangement for averaging useful life of magnetoresistive effect sensors
HITACHI LTD0 citations52
US6014275AJan 11, 2000
Magnetic recording drive
HITACHI LTD0 citations52
HITACHI GLOBAL STORAGE TECH
4 patentsUS7056604B2Jun 6, 2006
Magnetic recording media and magnetic recording system using the same
HITACHI GLOBAL STORAGE TECH11 citations84
US7054120B2May 30, 2006
Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect
HITACHI GLOBAL STORAGE TECH7 citations74
US7157162B2Jan 2, 2007
Magnetic recording medium and magnetic recording and reproducing apparatus
HITACHI GLOBAL STORAGE TECH0 citations52
US6692843B2Feb 17, 2004
Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storage
HITACHI GLOBAL STORAGE TECH1 citations52