Inventor · disambiguated record
Tazumi Nagasawa
Also filed as: NAGASAWA TAZUMI
68 granted patents·7 pending applications·282 citations·filing 2007–2025
98Inventor score
Top patents by PatentIndex Score
75 records- 0199US11393493B1Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2021·Granted Jul 19, 2022·17 cites·20 claims
- 0298US11398244B2Magnetic head with stacked body having non-magnetic layers and differing length magnetic layersTOSHIBA KK·Filed 2021·Granted Jul 26, 2022·11 cites·12 claims
- 0397US11721359B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2022·Granted Aug 8, 2023·3 cites·12 claims
- 0496US11631423B2Magnetic recording deviceTOSHIBA KK·Filed 2022·Granted Apr 18, 2023·7 cites·21 claims
- 0596US8737122B2Nonvolatile memory deviceSAIDA DAISUKE·Filed 2012·Granted May 27, 2014·34 cites·19 claims
- 0696US8194361B2Spin-torque oscillator, magnetic head including the spin-torque oscillator, and magnetic recording and reproducing apparatusKUDO KIWAMU·Filed 2008·Granted Jun 5, 2012·51 cites·7 claims
- 0795US10978098B1Magnetic recording deviceTOSHIBA KK·Filed 2020·Granted Apr 13, 2021·6 cites·17 claims
- 0895US9159342B2Magnetic recording apparatusTOSHIBA KK·Filed 2014·Granted Oct 13, 2015·31 cites·12 claims
- 0994US12080325B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2023·Granted Sep 3, 2024·1 cites·17 claims
- 1094US8982514B2Magnetic oscillatorNAGASAWA TAZUMI·Filed 2013·Granted Mar 17, 2015·13 cites·16 claims
- 1192US8755153B2Reproducing head with spin-torque oscillator, and magnetic recording and reproducing apparatusKUDO KIWAMU·Filed 2012·Granted Jun 17, 2014·22 cites·7 claims
- 1291US8174798B2Spin-torque oscillator, a magnetic sensor and a magnetic recording systemNAGASAWA TAZUMI·Filed 2009·Granted May 8, 2012·21 cites·5 claims
- 1390US11710501B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2022·Granted Jul 25, 2023·2 cites·25 claims
- 1490US11705152B2Magnetic head and magnetic recording device including a stacked body having a first magnetic member and a second magnetic memberTOSHIBA KK·Filed 2022·Granted Jul 18, 2023·2 cites·6 claims
- 1590US8896973B2Magnetic head with a spin torque oscillator, magnetic sensor, and magnetic recording/reproducing apparatusNAGASAWA TAZUMI·Filed 2012·Granted Nov 25, 2014·14 cites·18 claims
- 1687US7940485B2Magnetic recording and reproducing apparatus having a magnetic read head with a spin-torque oscillatorTOSHIBA KK·Filed 2009·Granted May 10, 2011·8 cites·7 claims
- 1786US12190917B2Magnetic head with multilayer configuration between magnetic poles and magnetic recording deviceTOSHIBA KK·Filed 2023·Granted Jan 7, 2025·2 cites·14 claims
- 1886US11443762B2Magnetic head and magnetic recording device including a stacked body having a first magnetic member and a second magnetic memberTOSHIBA KK·Filed 2021·Granted Sep 13, 2022·2 cites·13 claims
- 1983US11004464B1Magnetic headTOSHIBA KK·Filed 2020·Granted May 11, 2021·2 cites·20 claims
- 2081US12165677B2Magnetic head with stacked body configurations and magnetic recording device including the sameTOSHIBA KK·Filed 2023·Granted Dec 10, 2024·1 cites·15 claims
- 2181US11881234B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2022·Granted Jan 23, 2024·1 cites·19 claims
- 2278US8553372B2Magnetic oscillatorNAGASAWA TAZUMI·Filed 2012·Granted Oct 8, 2013·3 cites·16 claims
- 2377US12437779B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2024·Granted Oct 7, 2025·0 cites·17 claims
- 2477US8207806B2Magnetic oscillation elementKUDO KIWAMU·Filed 2011·Granted Jun 26, 2012·4 cites·5 claims
- 2574US11138994B2Magnetic head and magnetic recording device having magnetic layers and non-magnetic layers between shield and magnetic poleTOSHIBA KK·Filed 2019·Granted Oct 5, 2021·2 cites·7 claims
- 2674US2025239272A1Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2025·Application pending·0 cites
- 2773US10127931B2Perpendicular magnetic recording and reproducing deviceTOSHIBA KK·Filed 2016·Granted Nov 13, 2018·3 cites·20 claims
- 2873US9001466B2Three-dimensional magnetic recording and reproducing apparatus including a plurality of magnetic layers having different resonant frequenciesSATO RIE·Filed 2012·Granted Apr 7, 2015·3 cites·12 claims
- 2972US11062728B2Magnetic head having specific distance between magnetic pole, stacked body, and first shield, and magnetic recording device including sameTOSHIBA KK·Filed 2020·Granted Jul 13, 2021·1 cites·18 claims
- 3071US12033676B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2022·Granted Jul 9, 2024·0 cites·20 claims
- 3171US9704552B2Multi-level magnetic recording apparatus utilizing cooperative magnetization dynamics induced by spin-torque oscillatorKABUSHIK KAISHA TOSHIBA·Filed 2015·Granted Jul 11, 2017·3 cites·11 claims
- 3271US8861120B2Magnetic medium and writing and reading methodYANG TAO·Filed 2012·Granted Oct 14, 2014·2 cites·9 claims
- 3370US8947170B2Spin-torque oscillatorYANG TAO·Filed 2012·Granted Feb 3, 2015·2 cites·6 claims
- 3469US8724261B2High-frequency magnetic field generation element and magnetic headSUTO HIROFUMI·Filed 2012·Granted May 13, 2014·3 cites·20 claims
- 3568US12424242B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2024·Granted Sep 23, 2025·0 cites·6 claims
- 3668US12165676B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2023·Granted Dec 10, 2024·0 cites·20 claims
- 3768US10210894B1Magnetic recording medium including multiple magnetic layers with multiple regions having aligned easy magnetization axes and magnetic recording and reproducing deviceTOSHIBA KK·Filed 2018·Granted Feb 19, 2019·2 cites·14 claims
- 3867US9070389B2Magnetic recording and reproducing apparatusTOSHIBA KK·Filed 2014·Granted Jun 30, 2015·1 cites·13 claims
- 3966US12300279B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2023·Granted May 13, 2025·0 cites·9 claims
- 4066US11062730B2Method for evaluating magnetic head and evaluation apparatus of magnetic headTOSHIBA KK·Filed 2020·Granted Jul 13, 2021·0 cites·20 claims
- 4165US10902869B2Magnetic head having a magnetic layer and first and second conductive layers provided between a shield and a magnetic pole and magnetic recording and reproducing deviceTOSHIBA KK·Filed 2019·Granted Jan 26, 2021·1 cites·20 claims
- 4265US10504544B2Magnetic head and magnetic recording and reproducing deviceTOSHIBA KK·Filed 2018·Granted Dec 10, 2019·0 cites·11 claims
- 4364US12249359B2Magnetic sensor, magnetic head, and magnetic recording deviceTOSHIBA KK·Filed 2023·Granted Mar 11, 2025·0 cites·23 claims
- 4461US11521644B2Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2021·Granted Dec 6, 2022·0 cites·20 claims
- 4561US11462239B2Magnetic head and magnetic recording device having magnetic layers and nonmagnetic layers between shield and magnetic poleTOSHIBA KK·Filed 2021·Granted Oct 4, 2022·0 cites·5 claims
- 4660US10027334B2Computing apparatus and computing methodTOSHIBA KK·Filed 2016·Granted Jul 17, 2018·1 cites·14 claims
- 4757US2025252970A1Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2025·Application pending·0 cites
- 4856US12165678B2Magnetic head having multiple shields and magnetic recording deviceTOSHIBA KK·Filed 2023·Granted Dec 10, 2024·0 cites·19 claims
- 4955US2008254230A1Particle deposition apparatus and particle deposition methodTOSHIBA KK·Filed 2007·Application pending·0 cites
- 5053US2025226002A1Magnetic head and magnetic recording deviceTOSHIBA KK·Filed 2024·Application pending·0 cites
Showing the top 50 of 75 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →