Inventor · disambiguated record
Youji Maruyama
Also filed as: MARUYAMA YOUJI
14 granted patents·2 pending applications·78 citations·filing 1982–2007
89Inventor score
Files withHITACHI LTD7HITACHI GLOBAL STORAGE TECH6HITACHI GLOBAL STORAGE TECH NL2NIPPON SEIKI CO LTD1
Top patents by PatentIndex Score
16 records- 0174US7485378B2Magnetic thin film headHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Feb 3, 2009·2 cites·3 claims
- 0273US5615192AInformation recording and reproducing method and apparatusHITACHI LTD·Filed 1994·Granted Mar 25, 1997·21 cites·24 claims
- 0368US7881012B2Magnetic head and magnetic disk storage apparatus mounting the headHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Feb 1, 2011·1 cites·8 claims
- 0468US4415262APhotomaskHITACHI LTD·Filed 1982·Granted Nov 15, 1983·28 cites·24 claims
- 0566US8000058B2Magnetic head for perpendicular recording having pole pieces provided on surface of soft magnetic filmHITACHI GLOBAL STORAGE TECH NL·Filed 2005·Granted Aug 16, 2011·1 cites·18 claims
- 0660US7679860B2Thin film magnetic head with layer having high saturation magnetic flux density, and magnetic storage apparatusHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Mar 16, 2010·2 cites·15 claims
- 0757US7262940B2Separate read/write magnetic headHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Aug 28, 2007·3 cites·5 claims
- 0851US5994893ADriving apparatus for stepping motor type instrumentNIPPON SEIKI CO LTD·Filed 1997·Granted Nov 30, 1999·14 cites·5 claims
- 0945US2006087766A1Thin film magnetic head with small track widthHITACHI GLOBAL STORAGE TECH·Filed 2005·Application pending·0 cites
- 1044US7589937B2Thin film magnetic head with high Fe alloy plating film and manufacturing method thereofHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Sep 15, 2009·0 cites·10 claims
- 1141US2004246621A1Magnetic head whose composite magnetic core is recessed from air bearing surfaceHITACHI GLOBAL STORAGE TECH·Filed 2004·Application pending·0 cites
- 1233US4845671ABloch line memory deviceHITACHI LTD·Filed 1988·Granted Jul 4, 1989·3 cites·9 claims
- 1331US5050122ABloch line memory device and method for operating sameHITACHI LTD·Filed 1987·Granted Sep 17, 1991·2 cites·16 claims
- 1430US5047978ABloch line memory deviceHITACHI LTD·Filed 1989·Granted Sep 10, 1991·0 cites·14 claims
- 1530US4949304ABloch line memory deviceHITACHI LTD·Filed 1988·Granted Aug 14, 1990·1 cites·7 claims
- 1629US4831584ABloch line memory deviceHITACHI LTD·Filed 1987·Granted May 16, 1989·0 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →