Inventor
FUTAMOTO MASAAKI
JP69 patents
⚠️ This page may combine multiple inventors who share the name “FUTAMOTO MASAAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
47 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
US6686070B1Feb 3, 2004
Perpendicular magnetic recording media, magnetic recording apparatus
HITACHI LTD95 citations98
US6183893B1Feb 6, 2001
Perpendicular magnetic recording medium and magnetic storage apparatus using the same
HITACHI LTD123 citations98
US6716516B2Apr 6, 2004
Magnetic recording medium and magnetic recording apparatus using the same
HITACHI LTD30 citations96
US6687099B2Feb 3, 2004
Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force difference
HITACHI LTD33 citations96
US6447936B1Sep 10, 2002
Magnetic recording medium and magnetic recording apparatus using the same
HITACHI LTD41 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
US5738927AApr 14, 1998
Perpendicular magnetic recording media and magnetic recording device
HITACHI LTD71 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
US4722869AFeb 2, 1988
Magnetic recording medium
HITACHI LTD58 citations96
US4467240AAug 21, 1984
Ion beam source
HITACHI LTD91 citations96
US6759148B2Jul 6, 2004
Perpendicular magnetic recording media and magnetic storage apparatus using the same
HITACHI LTD26 citations93
US6528149B2Mar 4, 2003
Perpendicular-magnetic recording media and magnetic recording apparatus
HITACHI LTD14 citations93
US6403203B2Jun 11, 2002
Magnetic recording medium and magnetic recording apparatus using the same
HITACHI LTD22 citations93
US6383667B1May 7, 2002
Magnetic recording medium
HITACHI LTD29 citations93
US5759681AJun 2, 1998
Magnetic recording medium and magnetic recording system using the same
HITACHI LTD53 citations93
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
US7097924B2Aug 29, 2006
Magnetic recording media and method of forming them
HITACHI LTD30 citations92
US6562453B1May 13, 2003
Perpendicular magnetic recording medium and magnetic recording apparatus
HITACHI LTD25 citations92
US6278593B1Aug 21, 2001
Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect
HITACHI LTD17 citations92
US6177208B1Jan 23, 2001
Magnetic recording system and magnetic recording medium used therefor
HITACHI LTD24 citations92
US6083599AJul 4, 2000
Perpendicular magnetic recording media and magnetic recording and reproducing apparatus using the same
HITACHI LTD19 citations92
US5650889AJul 22, 1997
Magnetic recording medium containing heavy rare gas atoms, and a magnetic transducing system using the medium
HITACHI LTD40 citations92
US5368986ANov 29, 1994
Information recording media, manufacturing method for the same, and information recording method
HITACHI LTD50 citations92
US5077266ADec 31, 1991
Method of forming weak-link josephson junction, and superconducting device employing the junction
HITACHI LTD25 citations92
US4840844AJun 20, 1989
Magnetic recording medium
HITACHI LTD38 citations92
US4743491AMay 10, 1988
Perpendicular magnetic recording medium and fabrication method therefor
HITACHI LTD46 citations92
US7351445B2Apr 1, 2008
Magnetic recording media and method of forming them
HITACHI LTD15 citations83
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
US4193013AMar 11, 1980
Cathode for an electron source and a method of producing the same
HITACHI LTD19 citations82
US5919581AJul 6, 1999
Magnetic recording system and magnetic recording medium used therefor
HITACHI LTD16 citations81
US7026810B2Apr 11, 2006
Method for testing or recording servo signal on perpendicular magnetic recording media
HITACHI LTD6 citations74
US6894488B2May 17, 2005
Method for testing or recording servo signal on perpendicular magnetic recording media
HITACHI LTD9 citations74
US6641901B2Nov 4, 2003
Perpendicular-magnetic recording media and magnetic recording apparatus
HITACHI LTD10 citations74
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
US6607849B2Aug 19, 2003
Magnetic recording medium and magnetic recording apparatus using the same
HITACHI LTD3 citations74
US6592976B2Jul 15, 2003
Magnetic recording medium and magnetic recording apparatus using the same
HITACHI LTD6 citations74
US6544672B1Apr 8, 2003
Magnetic recording medium and magnetic storage
HITACHI LTD12 citations74
US6541125B2Apr 1, 2003
Magnetic recording medium
HITACHI LTD6 citations74
HITACHI GLOBAL STORAGE TECH
3 patentsUS7147941B2Dec 12, 2006
Perpendicular magnetic recording media, magnetic recording apparatus
HITACHI GLOBAL STORAGE TECH9 citations74
US7054120B2May 30, 2006
Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect
HITACHI GLOBAL STORAGE TECH7 citations74
US6926974B2Aug 9, 2005
Perpendicular magnetic recording medium and magnetic storage apparatus
HITACHI GLOBAL STORAGE TECH10 citations74
Showing the top 50 of 69 patents by PatentIndex Score.