Inventor · disambiguated record
Yoshiyuki Hirayama
Also filed as: HIRAYAMA YOSHIYUKI
61 granted patents·12 pending applications·1,160 citations·filing 1982–2024
99Inventor score
Files withHITACHI LTD30HITACHI GLOBAL STORAGE TECH19FUJI XEROX CO LTD7FURUKAWA ELECTRIC CO LTD3HGST Netherlands BV3
Top patents by PatentIndex Score
73 records- 0198US9275672B2Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk driveHITACHI LTD·Filed 2013·Granted Mar 1, 2016·87 cites·18 claims
- 0296US6183893B1Perpendicular magnetic recording medium and magnetic storage apparatus using the sameHITACHI LTD·Filed 1999·Granted Feb 6, 2001·123 cites·22 claims
- 0394US6686070B1Perpendicular magnetic recording media, magnetic recording apparatusHITACHI LTD·Filed 2000·Granted Feb 3, 2004·95 cites·8 claims
- 0494US6447936B1Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2000·Granted Sep 10, 2002·41 cites·4 claims
- 0593US7368185B2Perpendicular magnetic recording media and magnetic storage apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted May 6, 2008·35 cites·12 claims
- 0691US6716516B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2002·Granted Apr 6, 2004·30 cites·3 claims
- 0791US5738927APerpendicular magnetic recording media and magnetic recording deviceHITACHI LTD·Filed 1995·Granted Apr 14, 1998·71 cites·28 claims
- 0889US6562453B1Perpendicular magnetic recording medium and magnetic recording apparatusHITACHI LTD·Filed 2000·Granted May 13, 2003·25 cites·9 claims
- 0989US5536585AMagnetic recording medium and fabrication method thereforHITACHI LTD·Filed 1994·Granted Jul 16, 1996·37 cites·44 claims
- 1087US7026810B2Method for testing or recording servo signal on perpendicular magnetic recording mediaHITACHI LTD·Filed 2005·Granted Apr 11, 2006·6 cites·6 claims
- 1185US7875373B2Perpendicular magnetic recording medium and magnetic storage apparatus using the sameHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Jan 25, 2011·6 cites·16 claims
- 1285US5701505AImage data parallel processing apparatusFUJI XEROX CO LTD·Filed 1995·Granted Dec 23, 1997·100 cites·17 claims
- 1383US9968017B2Electromagnetic shielding tubeFURUKAWA AUTOMOTIVE SYSTEMS INC·Filed 2015·Granted May 8, 2018·10 cites·5 claims
- 1482US7033686B2Perpendicular magnetic recording medium and method of manufacturing itHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Apr 25, 2006·14 cites·5 claims
- 1581US6884521B2Magnetic recording medium with controlled grain diameters and method for manufacturing the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Apr 26, 2005·12 cites·11 claims
- 1680US7618722B2Perpendicular magnetic recording media and magnetic storage apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Nov 17, 2009·3 cites·19 claims
- 1780US6916557B2Perpendicular magnetic recording mediaHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jul 12, 2005·12 cites·8 claims
- 1880US6383667B1Magnetic recording mediumHITACHI LTD·Filed 1999·Granted May 7, 2002·29 cites·14 claims
- 1979US7641989B2Perpendicular magnetic recording medium for high density recording and manufacturing of the sameHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 5, 2010·3 cites·11 claims
- 2078US7701667B2Perpendicular magnetic recording medium and magnetic storage apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Apr 20, 2010·3 cites·12 claims
- 2178US4533234AAutomatic density control method for a photocopying machineFUJI XEROX CO LTD·Filed 1982·Granted Aug 6, 1985·23 cites·8 claims
- 2277US8771849B2Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus using the sameNEMOTO HIROAKI·Filed 2008·Granted Jul 8, 2014·3 cites·20 claims
- 2377US6894488B2Method for testing or recording servo signal on perpendicular magnetic recording mediaHITACHI LTD·Filed 2002·Granted May 17, 2005·9 cites·8 claims
- 2477US6403203B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 1999·Granted Jun 11, 2002·22 cites·7 claims
- 2577US5685958AMethod of fabricating a magnetic recording mediumHITACHI LTD·Filed 1996·Granted Nov 11, 1997·23 cites·6 claims
- 2677US5572043ASchottky junction device having a Schottky junction of a semiconductor and a metalFURUKAWA ELECTRIC CO LTD·Filed 1995·Granted Nov 5, 1996·39 cites·7 claims
- 2776US6528149B2Perpendicular-magnetic recording media and magnetic recording apparatusHITACHI LTD·Filed 2001·Granted Mar 4, 2003·14 cites·8 claims
- 2871US8883327B2Microwave assisted magnetic recording medium and information recording apparatus using the sameHITACHI LTD·Filed 2013·Granted Nov 11, 2014·2 cites·14 claims
- 2971US7261958B2Magnetic recording medium and magnetic recording system using the sameHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Aug 28, 2007·8 cites·7 claims
- 3071US2011027326A1External Composition for SkinROHTO PHARMA·Filed 2009·Application pending·0 cites
- 3170US8873179B1Bit-patterned media magnetic recording disk with two sizes of dots and imprint template made with directed self-assembly (DSA) of block copolymersHGST Netherlands BV·Filed 2013·Granted Oct 28, 2014·2 cites·15 claims
- 3270US7249405B2Method for manufacturing a magnetic mediumHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jul 31, 2007·1 cites·6 claims
- 3370US6641901B2Perpendicular-magnetic recording media and magnetic recording apparatusHITACHI LTD·Filed 2003·Granted Nov 4, 2003·10 cites·3 claims
- 3470US5599580AMethod of fabricating a magnetic recording mediumHITACHI LTD·Filed 1996·Granted Feb 4, 1997·17 cites·19 claims
- 3569US7534507B2Perpendicular magnetic recording medium for high density magnetic recording and manufacturing of the sameHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted May 19, 2009·1 cites·5 claims
- 3669US7147941B2Perpendicular magnetic recording media, magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Dec 12, 2006·9 cites·5 claims
- 3768US7651795B2Perpendicular magnetic recording medium and manufacturing of the sameHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 26, 2010·1 cites·6 claims
- 3868US6830837B2Magnetic recording medium and magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Dec 14, 2004·20 cites·23 claims
- 3968US6083599APerpendicular magnetic recording media and magnetic recording and reproducing apparatus using the sameHITACHI LTD·Filed 1997·Granted Jul 4, 2000·19 cites·15 claims
- 4065US6592976B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2001·Granted Jul 15, 2003·6 cites·5 claims
- 4164US9595282B2Magnetic recording medium having a L10-type ordered alloyHGST Netherlands BV·Filed 2015·Granted Mar 14, 2017·2 cites·17 claims
- 4263US6534164B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2001·Granted Mar 18, 2003·4 cites·2 claims
- 4362US4460270AAutomatic exposure control for a photocopying machineFUJI XEROX CO LTD·Filed 1982·Granted Jul 17, 1984·12 cites·5 claims
- 4461US5875082AMagnetic recording media, magnetic heads and magnetic read-write apparatus using the sameHITACHI LTD·Filed 1997·Granted Feb 23, 1999·12 cites·16 claims
- 4561US2008186627A1Perpendicular magnetic recording medium with granular structured magnetic recording layer, method for producing the same, and magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2008·Application pending·0 cites
- 4660US6607849B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2002·Granted Aug 19, 2003·3 cites·2 claims
- 4760US2013210921A1Method for Giving Warmth to SkinROHTO PHARMA·Filed 2013·Application pending·0 cites
- 4860US2024381782A1Magnetoresistive devices and semiconductor devicesSAMSUNG ELECTRONICS CO LTD·Filed 2024·Application pending·0 cites
- 4958US6349008B1Magnetic recording media, magnetic heads and magnetic read-write apparatus using the sameHITACHI LTD·Filed 1998·Granted Feb 19, 2002·11 cites·8 claims
- 5057US5926579AImage processing apparatus capable of properly determining density of a background portionFUJI XEROX CO LTD·Filed 1995·Granted Jul 20, 1999·21 cites·9 claims
Showing the top 50 of 73 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →