Inventor · disambiguated record
Junichi Akiyama
Also filed as: AKIYAMA JUNICHI
63 granted patents·12 pending applications·2,407 citations·filing 1973–2020
99Inventor score
Top patents by PatentIndex Score
75 records- 0199US7957098B2Magnetic recording head and magnetic recording apparatusTOSHIBA KK·Filed 2008·Granted Jun 7, 2011·128 cites·21 claims
- 0298US7791829B2Apparatus for assisting write operation using high frequency magnetic field in disk driveTOSHIBA KK·Filed 2008·Granted Sep 7, 2010·65 cites·12 claims
- 0397US8139322B2Magnetic recording head with protruding spin torque oscillatorYAMADA KENICHIRO·Filed 2008·Granted Mar 20, 2012·45 cites·20 claims
- 0497US6830824B2Magnetic recording medium with multiple magnetic layers capable of being exchange coupled at elevated temperatures and magnetic recording apparatusTOSHIBA KK·Filed 2001·Granted Dec 14, 2004·105 cites·32 claims
- 0597US6636460B2Thermally-assisted magnetic recording method and thermally-assisted magnetic recorderTOSHIBA KK·Filed 2000·Granted Oct 21, 2003·87 cites·20 claims
- 0696US8270112B2Magnetic head with spin oscillation device(s) and magnetic recording deviceFUNAYAMA TOMOMI·Filed 2008·Granted Sep 18, 2012·67 cites·16 claims
- 0796US8164854B2Magnetic recording head with spin oscillation device and magnetic recording apparatus including the magnetic recording headTAKAGISHI MASAYUKI·Filed 2008·Granted Apr 24, 2012·45 cites·26 claims
- 0896US8154825B2Magnetic recording head and magnetic recording deviceTAKASHITA MASAHIRO·Filed 2008·Granted Apr 10, 2012·76 cites·21 claims
- 0996US6795380B2Optically-assisted magnetic recording head and optically-assisted magnetic recording apparatusTOSHIBA KK·Filed 2002·Granted Sep 21, 2004·62 cites·13 claims
- 1096US5815342APerpendicular magnetic recording/reproducing apparatusTOSHIBA KK·Filed 1995·Granted Sep 29, 1998·131 cites·9 claims
- 1195US8400734B2Magnetic recording head and magnetic recording apparatusYAMADA KENICHIRO·Filed 2011·Granted Mar 19, 2013·30 cites·15 claims
- 1295US8238060B2Magnetic recording head and magnetic recording apparatusYAMADA KENICHIRO·Filed 2010·Granted Aug 7, 2012·24 cites·15 claims
- 1395US7042810B2Thermally-assisted magnetic recording head, method of manufacturing the same, and thermally-assisted magnetic recording apparatusTOSHIBA KK·Filed 2001·Granted May 9, 2006·60 cites·16 claims
- 1495US6741524B2Thermally-assisted magnetic recording and reproducing device having an electron beam thermal sourceTOSHIBA KK·Filed 2000·Granted May 25, 2004·57 cites·18 claims
- 1594US6982845B2Magnetic recording apparatus and magnetic recording methodTOSHIBA KK·Filed 2003·Granted Jan 3, 2006·47 cites·19 claims
- 1694US6881495B2Magnetic recording medium including functional and recording layers orthogonally exchange coupledTOSHIBA KK·Filed 2002·Granted Apr 19, 2005·38 cites·4 claims
- 1794US5304975AMagnetoresistance effect element and magnetoresistance effect sensorTOSHIBA KK·Filed 1992·Granted Apr 19, 1994·117 cites·21 claims
- 1893US8547662B2Magnetic recording head and magnetic recording apparatusYAMADA KENICHIRO·Filed 2012·Granted Oct 1, 2013·16 cites·26 claims
- 1993US8264799B2Magnetic recording headAKIYAMA JUNICHI·Filed 2008·Granted Sep 11, 2012·34 cites·16 claims
- 2093US5905611AThin film magnetic head responsive to spin-dependent scatteringTOSHIBA KK·Filed 1997·Granted May 18, 1999·66 cites·18 claims
- 2193US5576915AMagnetoresistive head with antiferromagnetic sublayers interposed between first and second spin-valve units to exchange bias inner magnetic films thereofTOSHIBA KK·Filed 1995·Granted Nov 19, 1996·75 cites·8 claims
- 2292US8654480B2Magnetic head with spin torque oscillator and magnetic recording headSHIMIZU MARIKO·Filed 2012·Granted Feb 18, 2014·20 cites·10 claims
- 2392US8295009B2Magnetic recording head and magnetic recording apparatusYAMADA KENICHIRO·Filed 2011·Granted Oct 23, 2012·18 cites·10 claims
- 2492US6172858B1Thin film headTOSHIBA KK·Filed 2000·Granted Jan 9, 2001·29 cites·15 claims
- 2591US5329413AMagnetoresistance sensor magnetically coupled with high-coercive force film at two end regionsTOSHIBA KK·Filed 1993·Granted Jul 12, 1994·55 cites·14 claims
- 2689US7372648B2Optically-assisted magnetic recording head and optically-assisted magnetic recording apparatusTOSHIBA KK·Filed 2004·Granted May 13, 2008·23 cites·8 claims
- 2789US6046891AThin film headTOSHIBA KK·Filed 1998·Granted Apr 4, 2000·43 cites·22 claims
- 2888US6021024AMagnetic disk drive having a constant skew angleTOSHIBA KK·Filed 1994·Granted Feb 1, 2000·48 cites·14 claims
- 2987US5942342APerpendicular recording medium and magnetic recording apparatusTOSHIBA KK·Filed 1997·Granted Aug 24, 1999·82 cites·19 claims
- 3085US7852739B2Positioning system mounted on probe memory device and positioning method thereofTOSHIBA KK·Filed 2008·Granted Dec 14, 2010·6 cites·12 claims
- 3185US7077133B2Oxygen enriching apparatus, controller, and recording mediumNGK SPARK PLUG CO·Filed 2001·Granted Jul 18, 2006·123 cites·23 claims
- 3284US7961586B2Information recording/reproducing deviceTOSHIBA KK·Filed 2007·Granted Jun 14, 2011·5 cites·19 claims
- 3384US5949600ASignal reproduction method and magnetic recording and reproducing apparatus using tunnel currentTOSHIBA KK·Filed 1996·Granted Sep 7, 1999·42 cites·10 claims
- 3483US6285528B1Thin-film magnetic headTOSHIBA KK·Filed 2000·Granted Sep 4, 2001·15 cites·11 claims
- 3583US6195233B1Perpendicular thin-film magnetic headTOSHIBA KK·Filed 2000·Granted Feb 27, 2001·15 cites·10 claims
- 3682US6777078B2Magnetic recording medium with L10 crystal grains including three or more elementsTOSHIBA KK·Filed 2002·Granted Aug 17, 2004·15 cites·17 claims
- 3781US6930847B2Magnetic recording-reproducing apparatusTOSHIBA KK·Filed 2002·Granted Aug 16, 2005·12 cites·14 claims
- 3880US7330335B2Magnetic recording medium, magnetic recording apparatus and magnetic recording methodTOSHIBA KK·Filed 2004·Granted Feb 12, 2008·10 cites·13 claims
- 3980US6837244B2Oxygen enriching apparatus, controller for the oxygen enriching apparatus, and recording medium for the controllerNGK SPARK PLUG CO·Filed 2001·Granted Jan 4, 2005·87 cites·11 claims
- 4079US8050171B2Information recording/reproducing device having head covering by resistance elementTOSHIBA KK·Filed 2008·Granted Nov 1, 2011·3 cites·20 claims
- 4179US5461527AMagneto-resistive headTOSHIBA KK·Filed 1994·Granted Oct 24, 1995·28 cites·11 claims
- 4275US5768066AMagnetoresistive head having an antiferromagnetic layer interposed between first and second magnetoresistive elementsTOSHIBA KK·Filed 1995·Granted Jun 16, 1998·58 cites·4 claims
- 4375US4677512AMagnetic reproducing apparatusTOSHIBA KK·Filed 1986·Granted Jun 30, 1987·22 cites·6 claims
- 4472US7017575B2Oxygen supply apparatus, controller for the oxygen supply apparatus, and recording medium for the controllerNGK SPARK PLUG CO·Filed 2001·Granted Mar 28, 2006·48 cites·17 claims
- 4571US6894857B2Magnetic recording apparatus and method of designing the sameTOSHIBA KK·Filed 2001·Granted May 17, 2005·8 cites·16 claims
- 4671US5828525ADifferential detection magnetoresistance headTOSHIBA KK·Filed 1995·Granted Oct 27, 1998·20 cites·2 claims
- 4771US5792564APerpendicular recording medium and magnetic recording apparatusTOSHIBA KK·Filed 1995·Granted Aug 11, 1998·34 cites·12 claims
- 4870US5801908AMagnetic disk drive comprising rotary actuator arm having optimal arm length for minimizing track misregistrationTOSHIBA KK·Filed 1996·Granted Sep 1, 1998·22 cites·12 claims
- 4967US7306657B2Oxygen concentrating apparatusNGK SPARK PLUG CO·Filed 2004·Granted Dec 11, 2007·34 cites·16 claims
- 5066US4593332AMagnetic reproduction system utilizing magnetic body as capacitorTOKYO SHIBAURA ELECTRIC CO·Filed 1983·Granted Jun 3, 1986·19 cites·11 claims
Showing the top 50 of 75 patent records by PatentIndex Score.
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