Inventor · disambiguated record
Kiwamu Tanahashi
Also filed as: TANAHASHI KIWAMU
49 granted patents·10 pending applications·642 citations·filing 1993–2016
98Inventor score
Files withHITACHI LTD29HITACHI GLOBAL STORAGE TECH11HGST Netherlands BV4HITACHI GLOBAL STORAGE TECH NL4TONOOKA SHUN3
Top patents by PatentIndex Score
59 records- 0190US6221508B1Magnetic recording mediaHITACHI LTD·Filed 1998·Granted Apr 24, 2001·47 cites·8 claims
- 0290US5750230AMagnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1993·Granted May 12, 1998·44 cites·27 claims
- 0388US6511761B1Magnetic recording media and magnetic storage apparatusHITACHI LTD·Filed 2000·Granted Jan 28, 2003·25 cites·12 claims
- 0487US7026810B2Method for testing or recording servo signal on perpendicular magnetic recording mediaHITACHI LTD·Filed 2005·Granted Apr 11, 2006·6 cites·6 claims
- 0586US6544667B1Magnetic recording medium, producing method of the same and magnetic recording systemHITACHI LTD·Filed 2000·Granted Apr 8, 2003·17 cites·17 claims
- 0685US7875371B2Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the sameHITACHI GLOBAL STORAGE TECH NL·Filed 2005·Granted Jan 25, 2011·5 cites·10 claims
- 0785US6894856B2Magnetic recording medium, magnetic recording apparatus using the same, and method and apparatus for manufacturing the magnetic recording mediumHITACHI LTD·Filed 2003·Granted May 17, 2005·16 cites·10 claims
- 0885US6403240B1Magnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1997·Granted Jun 11, 2002·35 cites·9 claims
- 0984US8390956B2Perpendicular magnetic recording medium having FCC seed layersTONOOKA SHUN·Filed 2010·Granted Mar 5, 2013·10 cites·20 claims
- 1083US8000060B2Perpendicular magnetic recording medium and system having a magnetic recording layer with a perpendicular recording layer, a magnetic coupling layer, and a writing assist layerHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted Aug 16, 2011·7 cites·23 claims
- 1182US6709768B2Magnetic recording medium and its manufacturing method and magnetic recording system using such a magnetic recording mediumHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Mar 23, 2004·13 cites·6 claims
- 1282US6596420B2Magnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 2002·Granted Jul 22, 2003·12 cites·5 claims
- 1382US5922456ALongitudal magnetic recording medium having a multi-layered underlayer and magnetic storage apparatus using such magnetic recording mediumHITACHI LTD·Filed 1997·Granted Jul 13, 1999·38 cites·31 claims
- 1481US7153596B2Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic storage apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Dec 26, 2006·14 cites·10 claims
- 1581US6759148B2Perpendicular magnetic recording media and magnetic storage apparatus using the sameHITACHI LTD·Filed 2001·Granted Jul 6, 2004·26 cites·1 claims
- 1681US6001447ALongitudinal magnetic recording media and magnetic storage apparatus using the sameHITACHI LTD·Filed 1998·Granted Dec 14, 1999·34 cites·27 claims
- 1780US6080476AMagnetic recording medium and magnetic recording system using such a magnetic recording mediumHITACHI LTD·Filed 1998·Granted Jun 27, 2000·32 cites·8 claims
- 1879US8440332B2Perpendicular magnetic recording medium and magnetic storage device using the sameTAMAI ICHIRO·Filed 2009·Granted May 14, 2013·4 cites·16 claims
- 1978US6723457B2Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the sameHITACHI LTD·Filed 2002·Granted Apr 20, 2004·32 cites·9 claims
- 2077US7217467B2Perpendicular magnetic recording medium and magnetic recording/reproducing apparatusHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted May 15, 2007·11 cites·16 claims
- 2177US6894488B2Method for testing or recording servo signal on perpendicular magnetic recording mediaHITACHI LTD·Filed 2002·Granted May 17, 2005·9 cites·8 claims
- 2277US6583958B1Magnetic recording medium and magnetic storage system using sameHITACHI LTD·Filed 2000·Granted Jun 24, 2003·11 cites·12 claims
- 2377US6574060B2Magnetic storage apparatusHITACHI LTD·Filed 2001·Granted Jun 3, 2003·9 cites·6 claims
- 2476US8592060B2Perpendicular magnetic recording media having low medium noise and systems using the sameTAMAI ICHIRO·Filed 2010·Granted Nov 26, 2013·4 cites·23 claims
- 2576US6569545B1Magnetic recording medium and a magnetic storage apparatusHITACHI LTD·Filed 1999·Granted May 27, 2003·24 cites·2 claims
- 2675US6057021AMagnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1997·Granted May 2, 2000·42 cites·7 claims
- 2772US5723198AMulti-layered magnetic recording medium and magnetic recording system employing the sameHITACHI LTD·Filed 1994·Granted Mar 3, 1998·29 cites·94 claims
- 2870US8298688B2Magnetic recording medium using layers having higher- and lower-HK anisotropic magnetic fieldsNEMOTO HIROAKI·Filed 2010·Granted Oct 30, 2012·2 cites·24 claims
- 2969US7041393B2Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted May 9, 2006·7 cites·39 claims
- 3067US9966095B2Perpendicular magnetic recording media having an extremely low Hk layerHGST Netherlands BV·Filed 2016·Granted May 8, 2018·2 cites·20 claims
- 3166US6808824B2Perpendicular magnetic recording mediaHITACHI LTD·Filed 2002·Granted Oct 26, 2004·9 cites·8 claims
- 3265US7050253B2Magnetic recording media and magnetic storage apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted May 23, 2006·4 cites·24 claims
- 3364US6924048B2Magnetic recording medium and a magnetic storage apparatusHITACHI LTD·Filed 2003·Granted Aug 2, 2005·4 cites·7 claims
- 3461US7182974B2Magnetic recording medium and its manufacturing method and magnetic recording system using such a magnetic recording mediumHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Feb 27, 2007·3 cites·3 claims
- 3561US5875082AMagnetic recording media, magnetic heads and magnetic read-write apparatus using the sameHITACHI LTD·Filed 1997·Granted Feb 23, 1999·12 cites·16 claims
- 3659US7056604B2Magnetic recording media and magnetic recording system using the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jun 6, 2006·11 cites·8 claims
- 3758US6349008B1Magnetic recording media, magnetic heads and magnetic read-write apparatus using the sameHITACHI LTD·Filed 1998·Granted Feb 19, 2002·11 cites·8 claims
- 3854US8252367B2Methods and apparatus to fabricate soft magnetic film with preferred uniaxial anisotropy for perpendicular recordingCHOE GUNN·Filed 2007·Granted Aug 28, 2012·0 cites·22 claims
- 3953US2009023016A1Perpendicular magnetic recording mediumTANAHASHI KIWAMU·Filed 2008·Application pending·0 cites
- 4052US7641774B2Manufacturing process for perpendicular magnetic recording mediumHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 5, 2010·0 cites·16 claims
- 4152US6605374B2Magnetic recording medium and magnetic recording system using such a magnetic recording mediumHITACHI LTD·Filed 2002·Granted Aug 12, 2003·3 cites·4 claims
- 4252US2005134988A1Magnetic recording medium, magnetic recording apparatus using the same, and method and apparatus for manufacturing the magnetic recording mediumHITACHI LTD·Filed 2005·Application pending·0 cites
- 4351US7138195B2Perpendicular magnetic recording media and magnetic storageHITACHI LTD·Filed 2004·Granted Nov 21, 2006·1 cites·4 claims
- 4451US6858330B2Perpendicular magnetic recording media and magnetic storage apparatus using the sameHITACHI LTD·Filed 2001·Granted Feb 22, 2005·9 cites·13 claims
- 4550US2008113225A1Perpendicular magnetic recording medium and method for manufacturing the sameHITACHI GLOBAL STORAGE TECH·Filed 2007·Application pending·0 cites
- 4650US2011032638A1Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the sameHITACHI GLOBAL STORAGE TECH NL·Filed 2010·Application pending·0 cites
- 4750US2011151144A1Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the sameHITACHI GLOBAL STORAGE TECH NL·Filed 2010·Application pending·0 cites
- 4849US9058831B2Perpendicular magnetic recording medium with grain boundary controlling layersTONOOKA SHUN·Filed 2011·Granted Jun 16, 2015·0 cites·23 claims
- 4949US8795478B2Method for manufacturing perpendicular magnetic recording mediumHONDA YOSHINORI·Filed 2005·Granted Aug 5, 2014·0 cites·20 claims
- 5049US7153546B2Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Dec 26, 2006·6 cites·4 claims
Showing the top 50 of 59 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →