Inventor · disambiguated record
Yoshiaki Sonobe
Also filed as: SONOBE YOSHIAKI
45 granted patents·4 pending applications·1,326 citations·filing 1986–2022
98Inventor score
Top patents by PatentIndex Score
49 records- 0199US6468670B1Magnetic recording disk with composite perpendicular recording layerIBM·Filed 2000·Granted Oct 22, 2002·184 cites·19 claims
- 0298US7833639B2Magnetic recording medium and method for manufacturing magnetic recording mediumWD MEDIA SINGAPORE PTE LTD·Filed 2007·Granted Nov 16, 2010·81 cites·6 claims
- 0397US8367228B2Magnetic recording medium having patterned auxiliary recording layer and method for manufacturing such magnetic recording mediumWD MEDIA SINGAPORE PTE LTD·Filed 2010·Granted Feb 5, 2013·74 cites·5 claims
- 0497US8298689B2Method of manufacturing a perpendicular magnetic recording mediumSONOBE YOSHIAKI·Filed 2008·Granted Oct 30, 2012·70 cites·9 claims
- 0597US8076013B2Magnetic recording medium, magnetic recording medium manufacturing method, and magnetic diskSONOBE YOSHIAKI·Filed 2008·Granted Dec 13, 2011·87 cites·15 claims
- 0697US7983003B2Magnetic recording medium having soft magnetic layer and perpendicular magnetic recording layerWD MEDIA SINGAPORE PTE LTD·Filed 2006·Granted Jul 19, 2011·69 cites·5 claims
- 0797US7955723B2Magnetic recording medium substrate and perpendicular magnetic recording mediumWD MEDIA SINGAPORE PTE LTD·Filed 2006·Granted Jun 7, 2011·69 cites·13 claims
- 0896US8003237B2Perpendicular magnetic recording disk and manufacturing method thereofWD MEDIA INC·Filed 2006·Granted Aug 23, 2011·72 cites·13 claims
- 0996US5189574AFlexible information storing disk apparatus having laminar air flowTOSHIBA KK·Filed 1989·Granted Feb 23, 1993·69 cites·1 claims
- 1095US8634155B2Thermally assisted magnetic recording disk with ion-implant facilitated non-magnetic regions, manufacturing method thereof, and magnetic recording methodYASUMORI JUNICHI·Filed 2011·Granted Jan 21, 2014·74 cites·15 claims
- 1195US8414966B2Magnetic recording medium and manufacturing method of the sameYASUMORI JUNICHI·Filed 2009·Granted Apr 9, 2013·71 cites·6 claims
- 1294US8795790B2Magnetic recording medium and magnetic recording medium manufacturing methodSONOBE YOSHIAKI·Filed 2009·Granted Aug 5, 2014·53 cites·5 claims
- 1394US8605388B2Magnetic recording medium with guard layer between auxiliary and magnetic recording layers and manufacturing method of the magnetic recording mediumYASUMORI JUNICHI·Filed 2009·Granted Dec 10, 2013·73 cites·4 claims
- 1493US8603650B2Perpendicular magnetic recording disk and manufacturing method thereofSONOBE YOSHIAKI·Filed 2005·Granted Dec 10, 2013·69 cites·10 claims
- 1593US4908722ADigital magnetic recording/reproduction apparatus and methodTOSHIBA KK·Filed 1988·Granted Mar 13, 1990·51 cites·14 claims
- 1691US10840435B2Magnetic tunnel junction device and magnetic resistance memory deviceSAMSUNG ELECTRONICS CO LTD·Filed 2019·Granted Nov 17, 2020·4 cites·20 claims
- 1789US11158672B2Magnetic tunnel junction elements and magnetic resistance memory devices including the sameSAMSUNG ELECTRONICS CO LTD·Filed 2019·Granted Oct 26, 2021·3 cites·20 claims
- 1887US9349944B2Magnetic tunnel junction deviceSAMSUNG ELECTRONICS CO LTD·Filed 2014·Granted May 24, 2016·6 cites·20 claims
- 1986US9715915B2Magneto-resistive devices including a free layer having different magnetic properties during operationsKITA EIJI·Filed 2015·Granted Jul 25, 2017·14 cites·19 claims
- 2086US4646168APerpendicular magnetic recording methodTOKYO SHIBAURA ELECTRIC CO·Filed 1986·Granted Feb 24, 1987·32 cites·16 claims
- 2177US10431279B2Magnetoresistive memory deviceSAMSUNG ELECTRONICS CO LTD·Filed 2017·Granted Oct 1, 2019·3 cites·10 claims
- 2277US6687067B2Perpendicular signal equalization and timing recovery using Hilbert transformIBM·Filed 2001·Granted Feb 3, 2004·11 cites·8 claims
- 2375US11522123B2Magnetic memory deviceSAMSUNG ELECTRONICS CO LTD·Filed 2020·Granted Dec 6, 2022·1 cites·16 claims
- 2474US5970602AHead actuator assembly and method for fabricating the sameIBM·Filed 1997·Granted Oct 26, 1999·28 cites·17 claims
- 2573US9005699B2Method for manufacturing magnetic recording mediumSONOBE YOSHIAKI·Filed 2007·Granted Apr 14, 2015·2 cites·6 claims
- 2673US6537638B2Magnetic recording disk with perpendicular magnetic recording layer and multilayered underlayer structureIBM·Filed 2000·Granted Mar 25, 2003·29 cites·9 claims
- 2769US10566042B2Magnetic tunnel junction devices and magnetoresistive memory devicesSAMSUNG ELECTRONICS CO LTD·Filed 2018·Granted Feb 18, 2020·2 cites·20 claims
- 2864US11942127B2Magnetic memory device and magnetic memory apparatusSAMSUNG ELECTRONICS CO LTD·Filed 2021·Granted Mar 26, 2024·0 cites·20 claims
- 2962US10679686B2Apparatus including magnetoresistive memory deviceSAMSUNG ELECTRONICS CO LTD·Filed 2019·Granted Jun 9, 2020·0 cites·10 claims
- 3059US10395809B2Perpendicular magnetic layer and magnetic device including the sameSAMSUNG ELECTRONICS CO LTD·Filed 2017·Granted Aug 27, 2019·0 cites·20 claims
- 3159US10170695B2Magnetic tunnel junction device utilizing lattice strainSONOBE YOSHIAKI·Filed 2016·Granted Jan 1, 2019·1 cites·19 claims
- 3258US8758911B2Perpendicular magnetic recording medium and perpendicular magnetic recording medium manufacturing methodSONOBE YOSHIAKI·Filed 2008·Granted Jun 24, 2014·0 cites·8 claims
- 3355US6104578AMagnetic disk and magnetic disk apparatus having an annular start-stop area with a radial downslopeIBM·Filed 1995·Granted Aug 15, 2000·12 cites·2 claims
- 3454US9093100B2Magnetic recording medium including tailored exchange coupling layer and manufacturing method of the sameWD MEDIA SINGAPORE PTE LTD·Filed 2013·Granted Jul 28, 2015·0 cites·7 claims
- 3553US11871678B2Magnetic memory device and operation method thereofSAMSUNG ELECTRONICS CO LTD·Filed 2022·Granted Jan 9, 2024·0 cites·19 claims
- 3653US10879451B2Magnetic tunnel junction device and magnetic resistance memory deviceSAMSUNG ELECTRONICS CO LTD·Filed 2019·Granted Dec 29, 2020·0 cites·19 claims
- 3752US11922985B2Magnetic memory device and magnetic memory apparatusSAMSUNG ELECTRONICS CO LTD·Filed 2021·Granted Mar 5, 2024·0 cites·19 claims
- 3850US12004355B2Magnetic tunnel junction element and magnetoresistive memory deviceSAMSUNG ELECTRONICS CO LTD·Filed 2021·Granted Jun 4, 2024·0 cites·18 claims
- 3947US2009117408A1Perpendicular magnetic recording disk and method of manufacturing the sameHOYA CORP·Filed 2007·Application pending·0 cites
- 4047US2009311557A1Perpendicular magnetic recording disk and method of manufacturing the sameONOUE TAKAHIRO·Filed 2007·Application pending·0 cites
- 4146US12125511B2Magnetic memory device and magnetic memory apparatus with perpendicular magnetic anisotropySAMSUNG ELECTRONICS CO LTD·Filed 2021·Granted Oct 22, 2024·0 cites·18 claims
- 4245US11302373B2Race track magnetic memory device and writing method thereofSAMSUNG ELECTRONICS CO LTD·Filed 2020·Granted Apr 12, 2022·0 cites·20 claims
- 4344US11309006B2Magnetic memory devices including magnetic structure with magnetic domainsSAMSUNG ELECTRONICS CO LTD·Filed 2020·Granted Apr 19, 2022·0 cites·14 claims
- 4444US5296980AMagnetic disk apparatus having recording heads for opposite disk surfaces which are offset from each otherIBM·Filed 1993·Granted Mar 22, 1994·5 cites·7 claims
- 4535US5863631APerpendicular magnetic recording medium and magnetic recording device using the sameIBM·Filed 1997·Granted Jan 26, 1999·6 cites·2 claims
- 4632USRE35670EFlexible information storing disk apparatus having laminar air flowTOSHIBA KK·Filed 1994·Granted Nov 25, 1997·1 cites·2 claims
- 4730US2018069173A1Magnetic tunnel junction deviceSONOBE YOSHIAKI·Filed 2017·Application pending·0 cites
- 4829US9424873B2Method of manufacturing magnetic recording medium, and magnetic recording mediumANIYA MASANORI·Filed 2010·Granted Aug 23, 2016·0 cites·10 claims
- 4925US2016087194A1Magnetic tunnel junction device and magnetoresistive random access memorySAMSUNG ELECTRONICS CO LTD·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →