Inventor · disambiguated record
Yoshibumi Matsuda
Also filed as: MATSUDA YOSHIBUMI
47 granted patents·4 pending applications·1,366 citations·filing 1987–2012
99Inventor score
Files withHITACHI LTD41HITACHI GLOBAL STORAGE TECH7HGST Netherlands BV1HITACHI STORAGE TECHNOLOGIES J1
Top patents by PatentIndex Score
51 records- 0198US5390061AMultilayer magnetoresistance effect-type magnetic headHITACHI LTD·Filed 1991·Granted Feb 14, 1995·156 cites·27 claims
- 0295US6687099B2Magnetic 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
- 0395US4833020AMagnetic recording mediumHITACHI LTD·Filed 1988·Granted May 23, 1989·77 cites·30 claims
- 0494US5851643AMagnetic recording media and magnetic recording read-back system which uses such mediaHITACHI LTD·Filed 1997·Granted Dec 22, 1998·192 cites·61 claims
- 0594US5766718ALongitudinal magnetic recording medium and apparatusHITACHI LTD·Filed 1994·Granted Jun 16, 1998·70 cites·28 claims
- 0694US5726837AMultilayer magnetoresistance effect-type magnetic headHITACHI LTD·Filed 1994·Granted Mar 10, 1998·43 cites·24 claims
- 0793US8630069B1Magnetic shield having improved resistance to the hard bias magnetic fieldHGST Netherlands BV·Filed 2012·Granted Jan 14, 2014·22 cites·18 claims
- 0893US5568331AMethod of head positioning and magnetic recording disk drive using the sameHITACHI LTD·Filed 1990·Granted Oct 22, 1996·67 cites·22 claims
- 0993US5147732ALongitudinal magnetic recording media and magnetic memory unitsHITACHI LTD·Filed 1989·Granted Sep 15, 1992·96 cites·34 claims
- 1091US5325244AMagnetic recording data storage systemHITACHI LTD·Filed 1992·Granted Jun 28, 1994·55 cites·12 claims
- 1191US5143794AMagnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatusHITACHI LTD·Filed 1989·Granted Sep 1, 1992·49 cites·8 claims
- 1289US6011674AMagnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositionsHITACHI LTD·Filed 1996·Granted Jan 4, 2000·33 cites·6 claims
- 1389US5536585AMagnetic recording medium and fabrication method thereforHITACHI LTD·Filed 1994·Granted Jul 16, 1996·37 cites·44 claims
- 1487US6623874B2Magnetic recording medium and magnetic recording apparatusHITACHI LTD·Filed 2001·Granted Sep 23, 2003·20 cites·10 claims
- 1586US6544667B1Magnetic recording medium, producing method of the same and magnetic recording systemHITACHI LTD·Filed 2000·Granted Apr 8, 2003·17 cites·17 claims
- 1686US6483677B2Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effectHITACHI LTD·Filed 2001·Granted Nov 19, 2002·11 cites·6 claims
- 1785US6403240B1Magnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1997·Granted Jun 11, 2002·35 cites·9 claims
- 1885US5093822AHigh-density magnetic recording and optical reproducing apparatusHITACHI LTD·Filed 1990·Granted Mar 3, 1992·39 cites·16 claims
- 1982US6627253B2Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatusHITACHI LTD·Filed 2001·Granted Sep 30, 2003·16 cites·6 claims
- 2082US6596420B2Magnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 2002·Granted Jul 22, 2003·12 cites·5 claims
- 2179US6278593B1Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effectHITACHI LTD·Filed 1999·Granted Aug 21, 2001·17 cites·64 claims
- 2277US5685958AMethod of fabricating a magnetic recording mediumHITACHI LTD·Filed 1996·Granted Nov 11, 1997·23 cites·6 claims
- 2377US5665478AMagnetic recording media for longitudinal recordingHITACHI LTD·Filed 1994·Granted Sep 9, 1997·32 cites·44 claims
- 2476US4883711AMagnetic recording mediumHITACHI LTD·Filed 1987·Granted Nov 28, 1989·30 cites·9 claims
- 2575US5372843AProcess for producing a magnetic recording medium using a patterned diffusion barrierHITACHI LTD·Filed 1992·Granted Dec 13, 1994·23 cites·11 claims
- 2670US6335103B1Magnetic recording media for longitudinal recordingHITACHI LTD·Filed 1997·Granted Jan 1, 2002·21 cites·26 claims
- 2770US5599580AMethod of fabricating a magnetic recording mediumHITACHI LTD·Filed 1996·Granted Feb 4, 1997·17 cites·19 claims
- 2869US7054120B2Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effectHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted May 30, 2006·7 cites·7 claims
- 2963US6197367B1Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storageHITACHI LTD·Filed 1997·Granted Mar 6, 2001·13 cites·4 claims
- 3062US6356406B1Magnetic storage systemHITACHI LTD·Filed 1993·Granted Mar 12, 2002·13 cites·117 claims
- 3159US7056604B2Magnetic recording media and magnetic recording system using the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jun 6, 2006·11 cites·8 claims
- 3259US7005202B2Magnetic recording medium and magnetic recording apparatusHITACHI LTD·Filed 2003·Granted Feb 28, 2006·3 cites·6 claims
- 3357US6613428B2Magnetic 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 OerstedsHITACHI LTD·Filed 2001·Granted Sep 2, 2003·4 cites·2 claims
- 3457US5906884AMagnetic recording mediumHITACHI LTD·Filed 1995·Granted May 25, 1999·13 cites·3 claims
- 3557US5736235AMagnetic recording medium having at least two magnetic layers with easy axes oriented in the same directionHITACHI LTD·Filed 1991·Granted Apr 7, 1998·16 cites·15 claims
- 3654US6372367B1Magnetic recording medium, method for producing the same and magnetic recording apparatus using the sameHITACHI LTD·Filed 1999·Granted Apr 16, 2002·20 cites·6 claims
- 3753US5572379AMagnetic recording drive having arrangements for average useful life of magnetorestive effects sensorsHITACHI LTD·Filed 1994·Granted Nov 5, 1996·6 cites·8 claims
- 3852US6692843B2Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storageHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Feb 17, 2004·1 cites·8 claims
- 3950US6846577B2Magnetic recording medium possessing a fluctuation field of not less than 30 OeHITACHI LTD·Filed 2003·Granted Jan 25, 2005·2 cites·11 claims
- 4050US2008113225A1Perpendicular magnetic recording medium and method for manufacturing the sameHITACHI GLOBAL STORAGE TECH·Filed 2007·Application pending·0 cites
- 4147US7157162B2Magnetic recording medium and magnetic recording and reproducing apparatusHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 2, 2007·0 cites·5 claims
- 4246US2004213991A1Magnetic recording medium and manufacturing method thereofHITACHI GLOBAL STORAGE TECH·Filed 2004·Application pending·0 cites
- 4344US2003118871A1Magnetic recording medium, producing method of the same magnetic recording systemFiled 2002·Application pending·0 cites
- 4442US6310748B1Magnetic thin film magnetic recording mediumHITACHI LTD·Filed 1995·Granted Oct 30, 2001·5 cites·17 claims
- 4538US6756113B2Magnetic recording medium and manufacturing method thereofHITACHI STORAGE TECHNOLOGIES J·Filed 2002·Granted Jun 29, 2004·0 cites·3 claims
- 4637US6623873B1Magnetic recording medium and magnetic disk apparatus using the sameHITACHI LTD·Filed 1999·Granted Sep 23, 2003·4 cites·5 claims
- 4737US4939045AMagnetic recording mediumHITACHI LTD·Filed 1988·Granted Jul 3, 1990·5 cites·22 claims
- 4836US2006109000A1Defect inspection method for perpendicular magnetic recording medium, magnetic disk device, and method of registering defects in magnetic disk device having a perpendicular magnetic recording medium thereinHITACHI GLOBAL STORAGE TECH·Filed 2005·Application pending·0 cites
- 4933US6703148B2Magnetic recording medium and magnetic disk apparatus using the sameHITACHI LTD·Filed 2002·Granted Mar 9, 2004·0 cites·5 claims
- 5031US6069762AMagnetic recording drive having arrangement for averaging useful life of magnetoresistive effect sensorsHITACHI LTD·Filed 1999·Granted May 30, 2000·0 cites·10 claims
Showing the top 50 of 51 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →