Inventor · disambiguated record
Masukazu Igarashi
Also filed as: IGARASHI MASUKAZU
45 granted patents·4 pending applications·743 citations·filing 1992–2015
98Inventor score
Files withHITACHI LTD26HGST Netherlands BV10IGARASHI MASUKAZU5HITACHI GLOBAL STORAGE TECH2AKAGI FUMIKO1
Top patents by PatentIndex Score
49 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
- 0297US9311934B1Symmetrical STO for oscillation with both polarity biasHGST Netherlands BV·Filed 2015·Granted Apr 12, 2016·33 cites·20 claims
- 0395US9007723B1Microwave-assisted magnetic recording (MAMR) head employing advanced current control to establish a magnetic resonance stateHGST Netherlands BV·Filed 2013·Granted Apr 14, 2015·33 cites·20 claims
- 0495US8879205B2High spin-torque efficiency spin-torque oscillator (STO) with dual spin polarization layerHGST Netherlands BV·Filed 2012·Granted Nov 4, 2014·32 cites·20 claims
- 0594US9230569B1Low Bs spin-polarizer for spin torque oscillatorHGST Netherlands BV·Filed 2014·Granted Jan 5, 2016·30 cites·20 claims
- 0693US9099107B1Stabilizing layer for a spin torque oscillator (STO)HGST Netherlands BV·Filed 2015·Granted Aug 4, 2015·22 cites·20 claims
- 0792US9378759B2Spin torque oscillator with low magnetic moment and high perpendicular magnetic anisotropy materialHGST Netherlands BV·Filed 2014·Granted Jun 28, 2016·17 cites·23 claims
- 0892US5815343AMagnetic recording medium, process for producing the same and magnetic recording systemHITACHI LTD·Filed 1997·Granted Sep 29, 1998·77 cites·62 claims
- 0991US9007722B2High frequency magnetic field assisted magnetic recording headHITACHI LTD·Filed 2013·Granted Apr 14, 2015·14 cites·7 claims
- 1091US8687319B2Magnetic recording apparatus with magnetic recording head capable of recording information on a magnetic recording mediumIGARASHI MASUKAZU·Filed 2012·Granted Apr 1, 2014·16 cites·12 claims
- 1190US6212024B1Recording equalizer and magnetic recording/reproducing apparatus performing write timing compensationHITACHI LTD·Filed 1998·Granted Apr 3, 2001·44 cites·9 claims
- 1289US9305574B1Negative-polarization spin-torque-oscillatorHGST Netherlands BV·Filed 2014·Granted Apr 5, 2016·10 cites·12 claims
- 1389US8547656B2Spin-torque oscillator (STO) for microwave-assisted magnetic recording (MAMR) and methods of use thereofIGARASHI MASUKAZU·Filed 2012·Granted Oct 1, 2013·11 cites·20 claims
- 1488US8363355B2Microwave-assisted magnetic recording device and method of formation thereofHITACHI GLOBAL STORAGE TECH NL·Filed 2010·Granted Jan 29, 2013·10 cites·15 claims
- 1587US9007721B2Microwave assisted magnetic recording head having spin torque oscillator, and magnetic recording apparatusHITACHI LTD·Filed 2013·Granted Apr 14, 2015·10 cites·4 claims
- 1687US8937789B2Microwave assisted magnetic recording head and magnetic data storage apparatusHITACHI LTD·Filed 2013·Granted Jan 20, 2015·8 cites·10 claims
- 1787US8810946B2Energy-assisted magnetic recording head and magnetic recording deviceYASUI KAN·Filed 2011·Granted Aug 19, 2014·9 cites·8 claims
- 1885US8582225B2Microwave-assisted magnetic recording head and magnetic read/write apparatus using the sameSHIIMOTO MASATO·Filed 2011·Granted Nov 12, 2013·8 cites·12 claims
- 1985US6635367B2Magnetic recording mediumHITACHI LTD·Filed 2001·Granted Oct 21, 2003·58 cites·17 claims
- 2084US8854768B2Magnetic head and magnetic recording/reproducing apparatusHITACHI LTD·Filed 2014·Granted Oct 7, 2014·6 cites·14 claims
- 2184US8830627B2Magnetic head, method for producing the magnetic head, and magnetic recording/reproducing apparatusHITACHI LTD·Filed 2013·Granted Sep 9, 2014·6 cites·10 claims
- 2284US8760806B2Microwave assisted magnetic recording head and microwave assisted magnetic recording apparatus having a magnetic flux rectifying layer with a magnetic flux rectifying actionIGARASHI MASUKAZU·Filed 2009·Granted Jun 24, 2014·6 cites·16 claims
- 2382US8089829B2Thermally assisted recording media and systemAKAGI FUMIKO·Filed 2009·Granted Jan 3, 2012·7 cites·20 claims
- 2481US6001447ALongitudinal magnetic recording media and magnetic storage apparatus using the sameHITACHI LTD·Filed 1998·Granted Dec 14, 1999·34 cites·27 claims
- 2579US8724260B2Information recording device having high-frequency field generating multilayer material with a receded section disposed between main and opposing polesIGARASHI MASUKAZU·Filed 2009·Granted May 13, 2014·9 cites·10 claims
- 2677US6356402B2Recording equalizer and magnetic recording/reproducing apparatus using the equalizerHITACHI LTD·Filed 2001·Granted Mar 12, 2002·8 cites·7 claims
- 2776US9437222B1Spin torque oscillator with high spin torque efficiency and reliabilityHGST Netherlands BV·Filed 2015·Granted Sep 6, 2016·4 cites·13 claims
- 2875US7446969B2Thermally assisted recording systemHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Nov 4, 2008·6 cites·19 claims
- 2975US6177208B1Magnetic recording system and magnetic recording medium used thereforHITACHI LTD·Filed 1999·Granted Jan 23, 2001·24 cites·16 claims
- 3071US9336797B2Extended spin torque oscillatorHGST Netherlands BV·Filed 2014·Granted May 10, 2016·2 cites·20 claims
- 3171US8883327B2Microwave assisted magnetic recording medium and information recording apparatus using the sameHITACHI LTD·Filed 2013·Granted Nov 11, 2014·2 cites·14 claims
- 3269US5561300AAtomic switching devices and logical circuitsHITACHI LTD·Filed 1992·Granted Oct 1, 1996·29 cites·36 claims
- 3368US7813071B2Thermally assisted recording systemHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Oct 12, 2010·3 cites·5 claims
- 3467US6728051B2Recording equalizer and magnetic recording/reproducing apparatus using the equalizerHITACHI LTD·Filed 2003·Granted Apr 27, 2004·4 cites·2 claims
- 3566US5919581AMagnetic recording system and magnetic recording medium used thereforHITACHI LTD·Filed 1996·Granted Jul 6, 1999·16 cites·16 claims
- 3664US6671116B2Magnetic recording system including magnetic recording medium having three-dimensional random orientation of axis of easy magnetizationHITACHI LTD·Filed 2002·Granted Dec 30, 2003·4 cites·4 claims
- 3759US6544672B1Magnetic recording medium and magnetic storageHITACHI LTD·Filed 2000·Granted Apr 8, 2003·12 cites·3 claims
- 3857US5906884AMagnetic recording mediumHITACHI LTD·Filed 1995·Granted May 25, 1999·13 cites·3 claims
- 3954US6549355B2Recording equalizer and magnetic recording/reproducing apparatus using the equalizerHITACHI LTD·Filed 2002·Granted Apr 15, 2003·1 cites·6 claims
- 4054US6487031B2Recording equalizer and magnetic recording/reproducing apparatus using the equalizerHITACHI LTD·Filed 2002·Granted Nov 26, 2002·1 cites·9 claims
- 4150US9305586B2Microwave-assisted magnetic recording device and method of formation thereofHGST Netherlands BV·Filed 2012·Granted Apr 5, 2016·0 cites·19 claims
- 4247US6456448B1Magnetic recording system including magnetic recording medium having three-dimensional random orientation of axis of easy magnetizationHITACHI LTD·Filed 1999·Granted Sep 24, 2002·6 cites·12 claims
- 4347US6251532B1Magnetic recording medium and magnetic storage device using the sameHITACHI LTD·Filed 1995·Granted Jun 26, 2001·11 cites·23 claims
- 4447US2007116989A1Magnetic recording media, its fabrication technique, and hard disk driveIKEKAME HIROSHI·Filed 2006·Application pending·0 cites
- 4544US6627255B2Method of manufacturing a magnetic recording mediaHITACHI LTD·Filed 2002·Granted Sep 30, 2003·0 cites·1 claims
- 4643US6365287B1Magnetic recording media and magnetic storage deviceHITACHI LTD·Filed 2000·Granted Apr 2, 2002·0 cites·6 claims
- 4743US2002146592A1Magnetic recording medium and magnetic storage device using the sameFiled 2002·Application pending·0 cites
- 4841US2012113542A1Oscillator in which polarity is changed at high speed, magnetic head for mamr and fast data transfer rate hddIGARASHI MASUKAZU·Filed 2011·Application pending·0 cites
- 4940US2004146747A1Perpendicular magnetic recording mediumHITACHI LTD·Filed 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →