Inventor · disambiguated record
Masafumi Mochizuki
Also filed as: MOCHIZUKI MASAFUMI
76 granted patents·7 pending applications·1,123 citations·filing 1980–2014
99Inventor score
Files withHITACHI GLOBAL STORAGE TECH24HITACHI LTD14VICTOR COMPANY OF JAPAN10HITACHI GLOBAL STORAGE TECH NL9MOCHIZUKI MASAFUMI5
Top patents by PatentIndex Score
83 records- 0198US7532433B2Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using itHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted May 12, 2009·51 cites·14 claims
- 0297US6710973B2Single pole type recording head including tapered edgesHITACHI LTD·Filed 2001·Granted Mar 23, 2004·113 cites·13 claims
- 0396US8634163B2Dual reverse microwave assisted magnetic recording (MAMR) and systems thereofTANABE HIROYASU·Filed 2011·Granted Jan 21, 2014·69 cites·14 claims
- 0496US6995949B2Magnetic heads for perpendicular recording and magnetic recording disk apparatus using the sameHITACHI LTD·Filed 2005·Granted Feb 7, 2006·32 cites·6 claims
- 0596US6813116B2Magnetic heads for perpendicular recording and magnetic recording disk apparatus using the sameHITACHI LTD·Filed 2002·Granted Nov 2, 2004·56 cites·12 claims
- 0695US7180704B2Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the headHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Feb 20, 2007·19 cites·7 claims
- 0795US6891697B2Magnetic heads for perpendicular recording and magnetic recording disk apparatus using the sameHITACHI LTD·Filed 2004·Granted May 10, 2005·41 cites·4 claims
- 0895US6710972B1Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the headHITACHI LTD·Filed 2003·Granted Mar 23, 2004·36 cites·20 claims
- 0994US7715152B2Magnetic recording head for perpendicular recording, fabrication process, and magnetic disk storage apparatus mounting the magnetic headHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted May 11, 2010·44 cites·16 claims
- 1094US7646564B2Perpendicular magnetic recording head for high frequency driveHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jan 12, 2010·27 cites·4 claims
- 1194US6775099B2High gradient-field recording head for perpendicular magnetic recordingHITACHI LTD·Filed 2002·Granted Aug 10, 2004·62 cites·10 claims
- 1293US8792210B2Asymmetric writer for shingled magnetic recordingDE LA FUENTE ANTON R·Filed 2012·Granted Jul 29, 2014·42 cites·15 claims
- 1393US7639452B2Magnetic head for perpendicular recording and fabrication processHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Dec 29, 2009·17 cites·5 claims
- 1493US7221538B2Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using itHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted May 22, 2007·30 cites·21 claims
- 1592US7450349B2Magnetic head with soft magnetic shield and magnetic storageHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Nov 11, 2008·16 cites·18 claims
- 1691US8310786B2Asymmetric writer for shingled magnetic recordingDE LA FUENTE ANTON R·Filed 2009·Granted Nov 13, 2012·16 cites·23 claims
- 1791US8223458B2Magnetic head having an asymmetrical shape and systems thereofMOCHIZUKI MASAFUMI·Filed 2010·Granted Jul 17, 2012·46 cites·16 claims
- 1891USD267714SPre-recorded cartridge video/audio diskVICTOR COMPANY OF JAPAN·Filed 1980·Granted Jan 25, 1983·26 cites·1 claims
- 1990US7426092B2Magnetic head and magnetic disk storage apparatus mounting the headHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Sep 16, 2008·10 cites·27 claims
- 2090US7054105B2Magnetic recording head for perpendicular recording and including a portion protruding toward a mail pole and magnetic disc storage apparatus mounting the magnetic headHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted May 30, 2006·28 cites·10 claims
- 2189US8830635B2Magnetic head having shield layer(s) with low coefficient of thermal expansion and magnetic storage apparatus having sameWATANABE KATSURO·Filed 2007·Granted Sep 9, 2014·12 cites·22 claims
- 2289US7990653B2Perpendicular recording magnetic head with a main magnetic pole piece and an auxiliary magnetic pole pieceHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Aug 2, 2011·9 cites·7 claims
- 2388US8786984B2Perpendicular magnetic write head having a current carrying element for in-plane field assisted magnetic recordingDAS SARBANOO·Filed 2011·Granted Jul 22, 2014·16 cites·20 claims
- 2488US8363355B2Microwave-assisted magnetic recording device and method of formation thereofHITACHI GLOBAL STORAGE TECH NL·Filed 2010·Granted Jan 29, 2013·10 cites·15 claims
- 2588USD271688SPre-recorded cartridge video/audio diskVICTOR COMPANY OF JAPAN·Filed 1981·Granted Dec 6, 1983·22 cites·1 claims
- 2687US7848053B2Magnetic head and magnetic disk storage apparatus mounting the headHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Dec 7, 2010·7 cites·16 claims
- 2787US7031108B2Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the headHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 18, 2006·5 cites·21 claims
- 2886US8472139B2Shingled magnetic recording (SMR) head with bent trailing shield and methods of production thereofURAKAMI YOSUKE·Filed 2011·Granted Jun 25, 2013·12 cites·21 claims
- 2986US8018672B2Magnetic recording device and magnetic recording method thereofHITACHI GLOBAL STORAGE TECH NL·Filed 2009·Granted Sep 13, 2011·6 cites·14 claims
- 3085US7545595B2Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angleHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jun 9, 2009·5 cites·1 claims
- 3185US7027248B2Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angleHITACHI LTD·Filed 2003·Granted Apr 11, 2006·16 cites·21 claims
- 3285US6657813B2Perpendicular magnetic recording systemHITACHI LTD·Filed 2001·Granted Dec 2, 2003·18 cites·6 claims
- 3384US7944646B2Magnetic disk driveHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted May 17, 2011·6 cites·7 claims
- 3483US8107180B2Hard-disk drive and control method for magnetic recording on a patterned medium of the hard-disk driveNISHIDA SHUJI·Filed 2009·Granted Jan 31, 2012·8 cites·9 claims
- 3583US7813079B2Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using itHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Oct 12, 2010·3 cites·10 claims
- 3682US7213195B2Data decoding method and circuit and information recording and reproducing apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted May 1, 2007·4 cites·4 claims
- 3781US8203803B2Magnetic recording head for perpendicular recording with wrap around shield, the fabrication process and magnetic disk storage apparatus mounting the magnetic headETOH KIMITOSHI·Filed 2005·Granted Jun 19, 2012·5 cites·18 claims
- 3880US8339749B2Perpendicular magnetic recording head, magnetic head, and magnetic disk device mounted with these headsMOCHIZUKI MASAFUMI·Filed 2008·Granted Dec 25, 2012·6 cites·18 claims
- 3979US8411384B2Writer having a shield structure for adjacent and far track interference refreshmentMOCHIZUKI MASAFUMI·Filed 2011·Granted Apr 2, 2013·8 cites·22 claims
- 4079US7969678B2Magnetic disk drive having assisted recording and methods of recording data theretoHITACHI GLOBAL STORAGE TECH NL·Filed 2009·Granted Jun 28, 2011·3 cites·20 claims
- 4179US7684149B2Magnetic head and magnetic disk storage apparatus mounting the sameHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Mar 23, 2010·12 cites·13 claims
- 4279US7038881B2Magnetic head for perpendicular recording including a main pole having a pole tip with three tapered sidesHITACHI LTD·Filed 2003·Granted May 2, 2006·12 cites·15 claims
- 4379US6741421B2Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the headHITACHI LTD·Filed 2002·Granted May 25, 2004·18 cites·10 claims
- 4478US6952380B2Apparatus and method for recording informationHITACHI LTD·Filed 2002·Granted Oct 4, 2005·13 cites·13 claims
- 4577US8254061B2Head-slider with protrusion control structure and manufacturing method of the head-slider with protrusion control structureKUROKI KENJI·Filed 2009·Granted Aug 28, 2012·3 cites·14 claims
- 4677US7475470B2Method for manufacturing a magnetic head for perpendicular recordingHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Jan 13, 2009·9 cites·3 claims
- 4777US7024617B2Data decoding method and circuit and information recording and reproducing apparatus using the sameHITACHI LTD·Filed 2002·Granted Apr 4, 2006·10 cites·7 claims
- 4876US8373940B2Magnetic head having a facing electrode pair for generating an electromagnetic field and applying energy to the magnetic recording layerHITACHI GLOBAL STORAGE TECH NL·Filed 2009·Granted Feb 12, 2013·2 cites·18 claims
- 4975US7483243B2Magnetic head with recessed portion, and magnetic recording and reproduction apparatus comprising the sameHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 27, 2009·2 cites·20 claims
- 5073US8225486B2Method of manufacturing a perpendicular magnetic recording headTAKAHASHI TOSHIO·Filed 2009·Granted Jul 24, 2012·2 cites·17 claims
Showing the top 50 of 83 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →