Inventor · disambiguated record
Yotsuo Yahisa
Also filed as: YAHISA YOTSUO
37 granted patents·4 pending applications·692 citations·filing 1989–2010
98Inventor score
Files withHITACHI LTD24HITACHI GLOBAL STORAGE TECH10TAMAI ICHIRO2HIROTSUNE AKEMI1HITACHI GLOBAL STORAGE TECH NL1
Top patents by PatentIndex Score
41 records- 0194US5605733AMagnetic recording medium, method for its production, and system for its useHITACHI LTD·Filed 1993·Granted Feb 25, 1997·70 cites·28 claims
- 0293US5236791AMagnetic recording medium and magnetic storageHITACHI LTD·Filed 1989·Granted Aug 17, 1993·58 cites·44 claims
- 0392US5815343AMagnetic recording medium, process for producing the same and magnetic recording systemHITACHI LTD·Filed 1997·Granted Sep 29, 1998·77 cites·62 claims
- 0491US5143794AMagnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatusHITACHI LTD·Filed 1989·Granted Sep 1, 1992·49 cites·8 claims
- 0590US5750230AMagnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1993·Granted May 12, 1998·44 cites·27 claims
- 0687US6623874B2Magnetic recording medium and magnetic recording apparatusHITACHI LTD·Filed 2001·Granted Sep 23, 2003·20 cites·10 claims
- 0786US6544667B1Magnetic recording medium, producing method of the same and magnetic recording systemHITACHI LTD·Filed 2000·Granted Apr 8, 2003·17 cites·17 claims
- 0885US6403240B1Magnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1997·Granted Jun 11, 2002·35 cites·9 claims
- 0982US6627253B2Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatusHITACHI LTD·Filed 2001·Granted Sep 30, 2003·16 cites·6 claims
- 1082US6596420B2Magnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 2002·Granted Jul 22, 2003·12 cites·5 claims
- 1181US6884521B2Magnetic recording medium with controlled grain diameters and method for manufacturing the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Apr 26, 2005·12 cites·11 claims
- 1277US6096445ASubstrate for a magnetic recording medium, the magnetic recording medium, and a method of producing the sameHITACHI LTD·Filed 1998·Granted Aug 1, 2000·29 cites·2 claims
- 1377US5665478AMagnetic recording media for longitudinal recordingHITACHI LTD·Filed 1994·Granted Sep 9, 1997·32 cites·44 claims
- 1476US8592060B2Perpendicular magnetic recording media having low medium noise and systems using the sameTAMAI ICHIRO·Filed 2010·Granted Nov 26, 2013·4 cites·23 claims
- 1575US6057021AMagnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1997·Granted May 2, 2000·42 cites·7 claims
- 1672US5723198AMulti-layered magnetic recording medium and magnetic recording system employing the sameHITACHI LTD·Filed 1994·Granted Mar 3, 1998·29 cites·94 claims
- 1771US7261958B2Magnetic recording medium and magnetic recording system using the sameHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Aug 28, 2007·8 cites·7 claims
- 1870US7249405B2Method for manufacturing a magnetic mediumHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jul 31, 2007·1 cites·6 claims
- 1970US6335103B1Magnetic recording media for longitudinal recordingHITACHI LTD·Filed 1997·Granted Jan 1, 2002·21 cites·26 claims
- 2068US6830837B2Magnetic recording medium and magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Dec 14, 2004·20 cites·23 claims
- 2167US5618639AMagnetic recording medium and magnetic recording apparatusHITACHI LTD·Filed 1994·Granted Apr 8, 1997·17 cites·29 claims
- 2265US7163756B2Magnetic recording mediumHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jan 16, 2007·5 cites·13 claims
- 2363US6197367B1Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storageHITACHI LTD·Filed 1997·Granted Mar 6, 2001·13 cites·4 claims
- 2461US7876530B2Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using sameHITACHI GLOBAL STORAGE TECH NL·Filed 2009·Granted Jan 25, 2011·2 cites·19 claims
- 2559US7056604B2Magnetic recording media and magnetic recording system using the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jun 6, 2006·11 cites·8 claims
- 2659US7005202B2Magnetic recording medium and magnetic recording apparatusHITACHI LTD·Filed 2003·Granted Feb 28, 2006·3 cites·6 claims
- 2757US5906884AMagnetic recording mediumHITACHI LTD·Filed 1995·Granted May 25, 1999·13 cites·3 claims
- 2855US7267894B2Magnetic recording medium and magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Sep 11, 2007·2 cites·10 claims
- 2954US6372367B1Magnetic recording medium, method for producing the same and magnetic recording apparatus using the sameHITACHI LTD·Filed 1999·Granted Apr 16, 2002·20 cites·6 claims
- 3053US7545604B2Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using sameHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jun 9, 2009·0 cites·17 claims
- 3152US6692843B2Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storageHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Feb 17, 2004·1 cites·8 claims
- 3246US2004213991A1Magnetic recording medium and manufacturing method thereofHITACHI GLOBAL STORAGE TECH·Filed 2004·Application pending·0 cites
- 3345US6887565B2Magnetic recording medium and magnetic storage deviceHITACHI LTD·Filed 2002·Granted May 3, 2005·5 cites·18 claims
- 3439US8703307B2Perpendicular magnetic recording medium and magnetic storage apparatus using the sameHIROTSUNE AKEMI·Filed 2010·Granted Apr 22, 2014·0 cites·14 claims
- 3539US2012044595A1Perpendicular magnetic recording medium (pmrm) and magnetic storage systems using the sameYAHISA YOTSUO·Filed 2010·Application pending·0 cites
- 3638US6756113B2Magnetic recording medium and manufacturing method thereofHITACHI STORAGE TECHNOLOGIES J·Filed 2002·Granted Jun 29, 2004·0 cites·3 claims
- 3737US6623873B1Magnetic recording medium and magnetic disk apparatus using the sameHITACHI LTD·Filed 1999·Granted Sep 23, 2003·4 cites·5 claims
- 3837US2012099220A1Perpendicular magnetic recording medium (pmrm) and systems thereofTAMAI ICHIRO·Filed 2010·Application pending·0 cites
- 3936US7338725B2Magnetic recording medium and magnetic storage deviceHITACHI LTD·Filed 2005·Granted Mar 4, 2008·0 cites·5 claims
- 4033US6703148B2Magnetic recording medium and magnetic disk apparatus using the sameHITACHI LTD·Filed 2002·Granted Mar 9, 2004·0 cites·5 claims
- 4131US2005084716A1Magnetic recording medium and magnetic recording apparatusHITACHI GLOBAL STORAGETECHNOLO·Filed 2004·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →