Inventor · disambiguated record
Masaaki Futamoto
Also filed as: FUTAMOTO MASAAKI
69 granted patents·1 pending application·2,008 citations·filing 1978–2006
99Inventor score
Top patents by PatentIndex Score
70 records- 0198US5390061AMultilayer magnetoresistance effect-type magnetic headHITACHI LTD·Filed 1991·Granted Feb 14, 1995·156 cites·27 claims
- 0297US4467240AIon beam sourceHITACHI LTD·Filed 1982·Granted Aug 21, 1984·91 cites·16 claims
- 0396US6183893B1Perpendicular magnetic recording medium and magnetic storage apparatus using the sameHITACHI LTD·Filed 1999·Granted Feb 6, 2001·123 cites·22 claims
- 0495US6687099B2Magnetic 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
- 0594US6686070B1Perpendicular magnetic recording media, magnetic recording apparatusHITACHI LTD·Filed 2000·Granted Feb 3, 2004·95 cites·8 claims
- 0694US6447936B1Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2000·Granted Sep 10, 2002·41 cites·4 claims
- 0794US5851643AMagnetic recording media and magnetic recording read-back system which uses such mediaHITACHI LTD·Filed 1997·Granted Dec 22, 1998·192 cites·61 claims
- 0894US5766718ALongitudinal magnetic recording medium and apparatusHITACHI LTD·Filed 1994·Granted Jun 16, 1998·70 cites·28 claims
- 0994US5726837AMultilayer magnetoresistance effect-type magnetic headHITACHI LTD·Filed 1994·Granted Mar 10, 1998·43 cites·24 claims
- 1093US7351445B2Magnetic recording media and method of forming themHITACHI LTD·Filed 2006·Granted Apr 1, 2008·15 cites·4 claims
- 1193US5568331AMethod of head positioning and magnetic recording disk drive using the sameHITACHI LTD·Filed 1990·Granted Oct 22, 1996·67 cites·22 claims
- 1291US7097924B2Magnetic recording media and method of forming themHITACHI LTD·Filed 2003·Granted Aug 29, 2006·30 cites·19 claims
- 1391US6716516B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2002·Granted Apr 6, 2004·30 cites·3 claims
- 1491US5738927APerpendicular magnetic recording media and magnetic recording deviceHITACHI LTD·Filed 1995·Granted Apr 14, 1998·71 cites·28 claims
- 1591US5325244AMagnetic recording data storage systemHITACHI LTD·Filed 1992·Granted Jun 28, 1994·55 cites·12 claims
- 1691US4743491APerpendicular magnetic recording medium and fabrication method thereforHITACHI LTD·Filed 1985·Granted May 10, 1988·46 cites·33 claims
- 1790US4722869AMagnetic recording mediumHITACHI LTD·Filed 1986·Granted Feb 2, 1988·58 cites·11 claims
- 1889US6562453B1Perpendicular magnetic recording medium and magnetic recording apparatusHITACHI LTD·Filed 2000·Granted May 13, 2003·25 cites·9 claims
- 1989US6011674AMagnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositionsHITACHI LTD·Filed 1996·Granted Jan 4, 2000·33 cites·6 claims
- 2089US5536585AMagnetic recording medium and fabrication method thereforHITACHI LTD·Filed 1994·Granted Jul 16, 1996·37 cites·44 claims
- 2189US4840844AMagnetic recording mediumHITACHI LTD·Filed 1987·Granted Jun 20, 1989·38 cites·18 claims
- 2288US5759681AMagnetic recording medium and magnetic recording system using the sameHITACHI LTD·Filed 1996·Granted Jun 2, 1998·53 cites·25 claims
- 2387US7026810B2Method for testing or recording servo signal on perpendicular magnetic recording mediaHITACHI LTD·Filed 2005·Granted Apr 11, 2006·6 cites·6 claims
- 2486US6483677B2Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effectHITACHI LTD·Filed 2001·Granted Nov 19, 2002·11 cites·6 claims
- 2585US5093822AHigh-density magnetic recording and optical reproducing apparatusHITACHI LTD·Filed 1990·Granted Mar 3, 1992·39 cites·16 claims
- 2683US5650889AMagnetic recording medium containing heavy rare gas atoms, and a magnetic transducing system using the mediumHITACHI LTD·Filed 1995·Granted Jul 22, 1997·40 cites·27 claims
- 2783US4193013ACathode for an electron source and a method of producing the sameHITACHI LTD·Filed 1978·Granted Mar 11, 1980·19 cites·14 claims
- 2881US6759148B2Perpendicular magnetic recording media and magnetic storage apparatus using the sameHITACHI LTD·Filed 2001·Granted Jul 6, 2004·26 cites·1 claims
- 2980US6383667B1Magnetic recording mediumHITACHI LTD·Filed 1999·Granted May 7, 2002·29 cites·14 claims
- 3080US5368986AInformation recording media, manufacturing method for the same, and information recording methodHITACHI LTD·Filed 1992·Granted Nov 29, 1994·50 cites·8 claims
- 3179US6278593B1Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effectHITACHI LTD·Filed 1999·Granted Aug 21, 2001·17 cites·64 claims
- 3278US6926974B2Perpendicular magnetic recording medium and magnetic storage apparatusHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Aug 9, 2005·10 cites·12 claims
- 3377US6894488B2Method for testing or recording servo signal on perpendicular magnetic recording mediaHITACHI LTD·Filed 2002·Granted May 17, 2005·9 cites·8 claims
- 3477US6403203B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 1999·Granted Jun 11, 2002·22 cites·7 claims
- 3577US5685958AMethod of fabricating a magnetic recording mediumHITACHI LTD·Filed 1996·Granted Nov 11, 1997·23 cites·6 claims
- 3676US6528149B2Perpendicular-magnetic recording media and magnetic recording apparatusHITACHI LTD·Filed 2001·Granted Mar 4, 2003·14 cites·8 claims
- 3775US7348078B2Perpendicular magnetic recording medium and magnetic storage apparatusHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Mar 25, 2008·2 cites·8 claims
- 3875US6177208B1Magnetic recording system and magnetic recording medium used thereforHITACHI LTD·Filed 1999·Granted Jan 23, 2001·24 cites·16 claims
- 3975US5372843AProcess for producing a magnetic recording medium using a patterned diffusion barrierHITACHI LTD·Filed 1992·Granted Dec 13, 1994·23 cites·11 claims
- 4070US6641901B2Perpendicular-magnetic recording media and magnetic recording apparatusHITACHI LTD·Filed 2003·Granted Nov 4, 2003·10 cites·3 claims
- 4170US5599580AMethod of fabricating a magnetic recording mediumHITACHI LTD·Filed 1996·Granted Feb 4, 1997·17 cites·19 claims
- 4269US7147941B2Perpendicular magnetic recording media, magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Dec 12, 2006·9 cites·5 claims
- 4369US7054120B2Magnetic 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
- 4468US6083599APerpendicular magnetic recording media and magnetic recording and reproducing apparatus using the sameHITACHI LTD·Filed 1997·Granted Jul 4, 2000·19 cites·15 claims
- 4568US5077266AMethod of forming weak-link josephson junction, and superconducting device employing the junctionHITACHI LTD·Filed 1989·Granted Dec 31, 1991·25 cites·16 claims
- 4667US4438371ASource of charged particles beamHITACHI LTD·Filed 1982·Granted Mar 20, 1984·12 cites·12 claims
- 4766US5919581AMagnetic recording system and magnetic recording medium used thereforHITACHI LTD·Filed 1996·Granted Jul 6, 1999·16 cites·16 claims
- 4865US6592976B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2001·Granted Jul 15, 2003·6 cites·5 claims
- 4963US6534164B2Magnetic recording medium and magnetic recording apparatus using the sameHITACHI LTD·Filed 2001·Granted Mar 18, 2003·4 cites·2 claims
- 5061US5875082AMagnetic recording media, magnetic heads and magnetic read-write apparatus using the sameHITACHI LTD·Filed 1997·Granted Feb 23, 1999·12 cites·16 claims
Showing the top 50 of 70 patent records by PatentIndex Score.
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