Inventor · disambiguated record
Yukimasa Okada
Also filed as: OKADA YUKIMASA
19 granted patents·2 pending applications·79 citations·filing 2007–2025
92Inventor score
Files withWESTERN DIGITAL TECH INC13HGST Netherlands BV5HITACHI GLOBAL STORAGE TECH NL1OKADA YUKIMASA1WAGATSUMA TAKASHI1
Top patents by PatentIndex Score
21 records- 0198US10777222B1Two-dimensional magnetic recording (TDMR) read head structure with different stacked sensors and disk drive incorporating the structureWESTERN DIGITAL TECH INC·Filed 2020·Granted Sep 15, 2020·26 cites·14 claims
- 0296US11514935B1Magnetic read sensors having stabilized upper readers, and related methodsWESTERN DIGITAL TECH INC·Filed 2021·Granted Nov 29, 2022·11 cites·19 claims
- 0396US11170808B1Dual free layer reader head with magnetic seed layer decoupled from shieldWESTERN DIGITAL TECH INC·Filed 2021·Granted Nov 9, 2021·11 cites·20 claims
- 0490US11170807B1Read head sensor with balanced shield designWESTERN DIGITAL TECH INC·Filed 2020·Granted Nov 9, 2021·3 cites·12 claims
- 0589US11127422B1Magnetic read sensors and related methods having a rear hard bias and no AFM layerWESTERN DIGITAL TECH INC·Filed 2020·Granted Sep 21, 2021·3 cites·19 claims
- 0688US9099123B1Magnetic sensor having optimal free layer back edge shape and extended pinned layerHGST Netherlands BV·Filed 2014·Granted Aug 4, 2015·10 cites·7 claims
- 0781US12243565B2Dual free layer read head having recessed sidewall insulator layer and method of making thereofWESTERN DIGITAL TECH INC·Filed 2023·Granted Mar 4, 2025·1 cites·17 claims
- 0880US11410690B2Two-dimensional magnetic recording reader with dual free layer magnetic tunnel junctionWESTERN DIGITAL TECH INC·Filed 2020·Granted Aug 9, 2022·2 cites·20 claims
- 0978US8873203B2Magnetic head having a soft magnetic layer formed behind a tunneling magnetoresistance (TMR) sensor in an element height directionHGST Netherlands BV·Filed 2012·Granted Oct 28, 2014·4 cites·20 claims
- 1075US8976492B1Magnetic head having two domain control layers for stabilizing magnetization of the hard bias layerHGST Netherlands BV·Filed 2013·Granted Mar 10, 2015·3 cites·20 claims
- 1174US8810953B2Error recovery based on applying current/voltage to a heating element of a magnetic headOKADA YUKIMASA·Filed 2011·Granted Aug 19, 2014·4 cites·20 claims
- 1271US2025273236A1DFL Reader Signal Sidebump Imbalance ReductionWESTERN DIGITAL TECH INC·Filed 2025·Application pending·0 cites
- 1366US12340825B2DFL reader signal sidebump imbalance reductionWESTERN DIGITAL TECH INC·Filed 2023·Granted Jun 24, 2025·0 cites·13 claims
- 1463US11557317B2Read head sensor with balanced shield designWESTERN DIGITAL TECH INC·Filed 2021·Granted Jan 17, 2023·0 cites·20 claims
- 1560US12437780B2DFL TDMR middle shield throat height control for improved stabilityWESTERN DIGITAL TECH INC·Filed 2023·Granted Oct 7, 2025·0 cites·19 claims
- 1659US11430470B2Magnetic read sensors and related methods having a rear hard bias and no AFM layerWESTERN DIGITAL TECH INC·Filed 2021·Granted Aug 30, 2022·0 cites·20 claims
- 1757US8760787B2Magnetic head having a thermal fly-height control (TFC) structure under a flat lower shieldWAGATSUMA TAKASHI·Filed 2011·Granted Jun 24, 2014·1 cites·20 claims
- 1856US9019649B2Error recovery based on applying current/voltage to a heating element of a magnetic headHGST Netherlands BV·Filed 2014·Granted Apr 28, 2015·0 cites·20 claims
- 1952US7957109B2Magnetic head of magnetoresistance effect type with high resistance to external stressHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Jun 7, 2011·0 cites·5 claims
- 2041US2024233762A1Magnetic Read Sensors Having Reduced Signal ImbalanceWESTERN DIGITAL TECH INC·Filed 2023·Application pending·0 cites
- 2138US10008224B2Magnetic read head with floating trailing shieldHGST Netherlands BV·Filed 2016·Granted Jun 26, 2018·0 cites·20 claims
Join the waitlist — get patent alerts
Get an alert when Yukimasa Okada files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →