Inventor · disambiguated record
Katsuro Watanabe
Also filed as: WATANABE KATSURO
67 granted patents·7 pending applications·1,070 citations·filing 1975–2021
99Inventor score
Files withHITACHI LTD30HITACHI GLOBAL STORAGE TECH13HGST Netherlands BV7HITACHI GLOBAL STORAGE TECH NL4HITACHI ASTEMO LTD3
Top patents by PatentIndex Score
74 records- 0198US9275672B2Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk driveHITACHI LTD·Filed 2013·Granted Mar 1, 2016·87 cites·18 claims
- 0297US9355655B1Magnetic capping layer structure for a spin torque oscillatorHGST Netherlands BV·Filed 2015·Granted May 31, 2016·35 cites·20 claims
- 0396US6560135B2Magnetic semiconductor memory apparatus and method of manufacturing the sameHITACHI LTD·Filed 2001·Granted May 6, 2003·94 cites·22 claims
- 0495US9672846B1STO bias control for MAMR head reliabilityHGST Netherlands BV·Filed 2016·Granted Jun 6, 2017·20 cites·16 claims
- 0595US9230573B1Magnetic recording head with non-magnetic bump structure formed on spin torque oscillatorHGST Netherlands BV·Filed 2015·Granted Jan 5, 2016·20 cites·20 claims
- 0695US9202484B1Magnetic head provided spin torque oscillator with low drive voltage for microwave assisted magnetic recordingHGST Netherlands BV·Filed 2015·Granted Dec 1, 2015·24 cites·19 claims
- 0794US8472135B1Microwave-assisted magnetic recording head having a current confinement structureKUSUKAWA KIKUO·Filed 2012·Granted Jun 25, 2013·66 cites·22 claims
- 0894US7280321B2Magnetoresistive headHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Oct 9, 2007·18 cites·7 claims
- 0993US7154713B2CPP-type magnetic head with less deformation and a magnetic recording/reproducing system using the sameHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Dec 26, 2006·16 cites·16 claims
- 1093US6636391B2Magnetoresistive sensor, magnetic head and magnetic disk apparatusHITACHI LTD·Filed 2001·Granted Oct 21, 2003·63 cites·15 claims
- 1193US4025132ABearing unitWADA SEIKO KABUSHIKI KAISHA WA·Filed 1975·Granted May 24, 1977·54 cites·5 claims
- 1292US6690163B1Magnetic sensorHITACHI LTD·Filed 2000·Granted Feb 10, 2004·41 cites·3 claims
- 1391US6795277B2Magnetic head and magnetic disk driveHITACHI LTD·Filed 2002·Granted Sep 21, 2004·27 cites·6 claims
- 1491US6456466B1Magnetic head with shield layer having discontinuous multi-layer or mixed layer and magnetic recording apparatus utilizing the magnetic headHITACHI LTD·Filed 2000·Granted Sep 24, 2002·29 cites·14 claims
- 1591US6172859B1Magnetoresistive head and magnetic disk apparatusHITACHI LTD·Filed 1996·Granted Jan 9, 2001·55 cites·21 claims
- 1690US9129621B1MAMR head with inclined MAMR head bodyHGST Netherlands BV·Filed 2015·Granted Sep 8, 2015·11 cites·20 claims
- 1790US7031119B2CPP-type magnetic head with less deformation and a magnetic recording/reproducing system using the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Apr 18, 2006·28 cites·6 claims
- 1890US5995338AMagnetoresistive head and magnetic disk apparatusHITACHI LTD·Filed 1996·Granted Nov 30, 1999·50 cites·16 claims
- 1989US8830635B2Magnetic head having shield layer(s) with low coefficient of thermal expansion and magnetic storage apparatus having sameWATANABE KATSURO·Filed 2007·Granted Sep 9, 2014·12 cites·22 claims
- 2089US7561384B2Magneto-resistive sensor having small track width and sensor height using stopper layerHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jul 14, 2009·10 cites·6 claims
- 2188US8917481B2High frequency magnetic field assisted magnetic recording head, and method of manufacturing sameHITACHI LTD·Filed 2014·Granted Dec 23, 2014·9 cites·8 claims
- 2288US6778363B2Magnetoresistive head having longitudinal biasing by providing undirectional magnetic anisotropyHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Aug 17, 2004·20 cites·17 claims
- 2388US6573586B2Semiconductor deviceHITACHI LTD·Filed 2002·Granted Jun 3, 2003·37 cites·8 claims
- 2487US9007721B2Microwave assisted magnetic recording head having spin torque oscillator, and magnetic recording apparatusHITACHI LTD·Filed 2013·Granted Apr 14, 2015·10 cites·4 claims
- 2587US8937789B2Microwave assisted magnetic recording head and magnetic data storage apparatusHITACHI LTD·Filed 2013·Granted Jan 20, 2015·8 cites·10 claims
- 2687US8149548B2Magnetic head and manufacturing method thereofHATATANI MASAHIKO·Filed 2009·Granted Apr 3, 2012·17 cites·16 claims
- 2786US7859799B2Magnetoresistive head and a manufacturing method thereofHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Dec 28, 2010·7 cites·13 claims
- 2886US6671136B2Magnetic head and magnetic disk apparatusHITACHI LTD·Filed 2001·Granted Dec 30, 2003·17 cites·8 claims
- 2985US8953282B2Magnetic head, and magnetic storage apparatusHITACHI LTD·Filed 2013·Granted Feb 10, 2015·7 cites·21 claims
- 3085US7505232B2Magnetic head with side shield and manufacturing method thereofHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Mar 17, 2009·9 cites·14 claims
- 3185US6157526AMagnetoresistive head and magnetic disk apparatusHITACHI LTD·Filed 1999·Granted Dec 5, 2000·35 cites·7 claims
- 3284US8854768B2Magnetic head and magnetic recording/reproducing apparatusHITACHI LTD·Filed 2014·Granted Oct 7, 2014·6 cites·14 claims
- 3384US8830627B2Magnetic head, method for producing the magnetic head, and magnetic recording/reproducing apparatusHITACHI LTD·Filed 2013·Granted Sep 9, 2014·6 cites·10 claims
- 3484US6934128B2Magnetic head and magnetic disk driveHITACHI LTD·Filed 2004·Granted Aug 23, 2005·14 cites·3 claims
- 3582US8837086B2Magnetic recording head, manufacturing method thereof, and magnetic disk deviceUDO YUTA·Filed 2012·Granted Sep 16, 2014·8 cites·12 claims
- 3680US8824103B2Magnetic recording head and magnetic recording apparatusSHIIMOTO MASATO·Filed 2012·Granted Sep 2, 2014·5 cites·5 claims
- 3777US7446981B2Magnetic head, fabrication process of magnetic head, and magnetic disk storage apparatus mounting magnetic headHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Nov 4, 2008·3 cites·8 claims
- 3877US6693774B2Magnetoresistive sensor and magnetic storage apparatusHITACHI LTD·Filed 2001·Granted Feb 17, 2004·11 cites·14 claims
- 3976US9437222B1Spin torque oscillator with high spin torque efficiency and reliabilityHGST Netherlands BV·Filed 2015·Granted Sep 6, 2016·4 cites·13 claims
- 4076US6643105B2Magnetic head having magnetic shield layersHITACHI LTD·Filed 2002·Granted Nov 4, 2003·9 cites·2 claims
- 4173US11993253B2Vehicle control device, vehicle control center, and parking assistance systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2019·Granted May 28, 2024·2 cites·10 claims
- 4271US8883327B2Microwave assisted magnetic recording medium and information recording apparatus using the sameHITACHI LTD·Filed 2013·Granted Nov 11, 2014·2 cites·14 claims
- 4371US6999270B2Magnetic head and a magnetic disk driveHITACHI LTD·Filed 2003·Granted Feb 14, 2006·8 cites·23 claims
- 4466US7274542B2Magnetic sensor having a free layer containing a single magnetic domainHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Sep 25, 2007·6 cites·10 claims
- 4565US7735213B2Method for fabricating magnetic head sliderHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Jun 15, 2010·4 cites·8 claims
- 4664US11292455B2Vehicle traveling control deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2019·Granted Apr 5, 2022·1 cites·12 claims
- 4763US7944651B2CPP-type magnetoresistive effect head and method of manufacturing the sameHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted May 17, 2011·3 cites·14 claims
- 4862US6130797AMagnetic recorder and magnetooptical recorderHITACHI LTD·Filed 1995·Granted Oct 10, 2000·16 cites·17 claims
- 4960US7089648B2Method for fabricating a magnetoresistive headHITACHI LTD·Filed 2004·Granted Aug 15, 2006·3 cites·6 claims
- 5058US2008212238A1Magnetoresistive head with larger longitudinal biasingWATANABE KATSURO·Filed 2008·Application pending·0 cites
Showing the top 50 of 74 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →