Inventor · disambiguated record
Yoji Maruyama
Also filed as: MARUYAMA YOJI
18 granted patents·3 pending applications·205 citations·filing 1990–2009
94Inventor score
Files withHITACHI GLOBAL STORAGE TECH9HITACHI LTD6FUJITA KOICHI1HITACHI GLOBAL STORAGE TECH NL1KIMURA WATARU1
Top patents by PatentIndex Score
21 records- 0195US7180704B2Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the headHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Feb 20, 2007·19 cites·7 claims
- 0295US6710972B1Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the headHITACHI LTD·Filed 2003·Granted Mar 23, 2004·36 cites·20 claims
- 0394US7646564B2Perpendicular magnetic recording head for high frequency driveHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jan 12, 2010·27 cites·4 claims
- 0488US6392849B2Magnetic head with dual spin valve element for differential operationHITACHI LTD·Filed 2001·Granted May 21, 2002·22 cites·14 claims
- 0587US7848053B2Magnetic head and magnetic disk storage apparatus mounting the headHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Dec 7, 2010·7 cites·16 claims
- 0687US7031108B2Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the headHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 18, 2006·5 cites·21 claims
- 0785US7330324B2Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a functionHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Feb 12, 2008·20 cites·19 claims
- 0882US6469873B1Magnetic head and magnetic storage apparatus using the sameHITACHI LTD·Filed 1998·Granted Oct 22, 2002·35 cites·5 claims
- 0975US7483243B2Magnetic head with recessed portion, and magnetic recording and reproduction apparatus comprising the sameHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 27, 2009·2 cites·20 claims
- 1073US7551395B2Main pole structure coupled with trailing gap for perpendicular recordingHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jun 23, 2009·2 cites·14 claims
- 1168US7542244B2Magnetic head to prevent undesired data erasure and magnetic disk storage having the sameHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jun 2, 2009·1 cites·13 claims
- 1268US7061726B2Thin film magnetic headHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jun 13, 2006·7 cites·14 claims
- 1366US6898057B2Thin film magnetic head having multiple layered films determining track width imbedded in an insulating film and method of manufacturing the sameHITACHI LTD·Filed 2003·Granted May 24, 2005·6 cites·20 claims
- 1465US7576952B2Magnetic write head including a magnetic pole piece having a protrusionHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Aug 18, 2009·6 cites·24 claims
- 1562US8437102B2Perpendicular magnetic head with side shield depth less than write gap filmMARUYAMA YOJI·Filed 2006·Granted May 7, 2013·3 cites·8 claims
- 1653US2009290257A1Magnetic head for perpendicular recording and magnetic recording apparatusKIMURA WATARU·Filed 2009·Application pending·0 cites
- 1749US2009154014A1Thin film magnetic head and manufacturing method thereofKUDO KAZUE·Filed 2008·Application pending·0 cites
- 1847US2004184189A1Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the headFiled 2004·Application pending·0 cites
- 1940US6118635AMagnetic storage apparatus having a head with sliding padsHITACHI LTD·Filed 1995·Granted Sep 12, 2000·5 cites·16 claims
- 2035US8569871B2Semiconductor device having a molded packageFUJITA KOICHI·Filed 2006·Granted Oct 29, 2013·0 cites·6 claims
- 2132US5023473ADrive circuit for Bloch line memoryHITACHI LTD·Filed 1990·Granted Jun 11, 1991·2 cites·31 claims
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