Inventor · disambiguated record
Takao Imagawa
Also filed as: IMAGAWA TAKAO
33 granted patents·9 pending applications·446 citations·filing 1988–2012
97Inventor score
Top patents by PatentIndex Score
42 records- 0191US7696662B2High resistance magnet and motor using the sameHITACHI LTD·Filed 2007·Granted Apr 13, 2010·18 cites·22 claims
- 0291US6172859B1Magnetoresistive head and magnetic disk apparatusHITACHI LTD·Filed 1996·Granted Jan 9, 2001·55 cites·21 claims
- 0390US5995338AMagnetoresistive head and magnetic disk apparatusHITACHI LTD·Filed 1996·Granted Nov 30, 1999·50 cites·16 claims
- 0486US8303732B2Rare earth magnetSUZUKI HIROYUKI·Filed 2010·Granted Nov 6, 2012·3 cites·12 claims
- 0586US7972450B2High resistance magnet and motor using the sameHITACHI LTD·Filed 2010·Granted Jul 5, 2011·7 cites·25 claims
- 0685US6157526AMagnetoresistive head and magnetic disk apparatusHITACHI LTD·Filed 1999·Granted Dec 5, 2000·35 cites·7 claims
- 0784US7352184B2MRI apparatus with high-resistance magnetHITACHI LTD·Filed 2006·Granted Apr 1, 2008·10 cites·9 claims
- 0883US8222785B2High resistance magnet and motor using the sameKOMURO MATAHIRO·Filed 2011·Granted Jul 17, 2012·4 cites·8 claims
- 0983US6275360B1Read-write headHITACHI LTD·Filed 1998·Granted Aug 14, 2001·45 cites·4 claims
- 1079US7880357B2Sintered magnet and rotating machine equipped with the sameHITACHI LTD·Filed 2009·Granted Feb 1, 2011·8 cites·13 claims
- 1178US7927501B2Rare earth element magnet and method of manufacturing sameHITACHI LTD·Filed 2007·Granted Apr 19, 2011·4 cites·17 claims
- 1278US6603643B2Magnetoresistive head containing oxide layerHITACHI LTD·Filed 2001·Granted Aug 5, 2003·12 cites·4 claims
- 1377US5668685AMagnetic disc apparatusHITACHI LTD·Filed 1994·Granted Sep 16, 1997·25 cites·30 claims
- 1476US5051856AThin film magnetic head with mixed crystal structuresHITACHI LTD·Filed 1989·Granted Sep 24, 1991·23 cites·13 claims
- 1575US7914695B2Magnet using binding agent and method of manufacturing the sameHITACHI LTD·Filed 2007·Granted Mar 29, 2011·3 cites·16 claims
- 1674US5436777AMagnetoresistive headHITACHI LTD·Filed 1992·Granted Jul 25, 1995·22 cites·26 claims
- 1771US7816820B2Compacted magnetic core with high resistance, manufacturing method thereof, and motor for electric carHITACHI LTD·Filed 2007·Granted Oct 19, 2010·2 cites·21 claims
- 1870US5726838AMagnetic disc apparatus with head having magneto-resistance effectHITACHI LTD·Filed 1995·Granted Mar 10, 1998·23 cites·18 claims
- 1967US4939610AThin film magnetic head having magnetic core including a thin film of cobalt alloyHITACHI LTD·Filed 1988·Granted Jul 3, 1990·14 cites·18 claims
- 2066US5214840AThin film magnetic head and the method of fabricating the sameHITACHI LTD·Filed 1990·Granted Jun 1, 1993·25 cites·11 claims
- 2166US4943883AQuarternary amorphous magnetic alloy thin film and magnetic head including sameHITACHI LTD·Filed 1988·Granted Jul 24, 1990·13 cites·12 claims
- 2264US7806991B2Low loss magnet and magnetic circuit using the sameHITACHI LTD·Filed 2006·Granted Oct 5, 2010·3 cites·19 claims
- 2361US6319622B1Magnetic headHITACHI LTD·Filed 2000·Granted Nov 20, 2001·3 cites·4 claims
- 2460US8226779B2Compacted magnetic core, production method of the same, and motor for electric vehicleIMAGAWA TAKAO·Filed 2008·Granted Jul 24, 2012·1 cites·8 claims
- 2555US7292416B2CPP magneto resistive head with decreased variation in asymmetry and outputHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Nov 6, 2007·0 cites·5 claims
- 2654US5969910AMagnetic head and magnetic disk apparatus provided therewithHITACHI LTD·Filed 1997·Granted Oct 19, 1999·11 cites·24 claims
- 2752US2009148718A1High Resistivity Compressed Magnetic CoreHITACHI LTD·Filed 2008·Application pending·0 cites
- 2850US2008043376A1Magnetic resistive head and magnetic recording apparatusHITACHI LTD·Filed 2007·Application pending·0 cites
- 2948US6088196AMagnetoresistive head and manufacturing method thereforHITACHI LTD·Filed 1997·Granted Jul 11, 2000·8 cites·22 claims
- 3048US5872690AMagnetic transducer and magnetic recording device utilizing material in which undirectional anisotropy can be formedHITACHI LTD·Filed 1997·Granted Feb 16, 1999·10 cites·16 claims
- 3147US7847555B2MRI apparatus with high-resistance magnetHITACHI LTD·Filed 2008·Granted Dec 7, 2010·0 cites·3 claims
- 3246US2008317620A1Rare earth element magnetHITACHI LTD·Filed 2008·Application pending·0 cites
- 3345US6120919AMagnetic headHITACHI LTD·Filed 1998·Granted Sep 19, 2000·5 cites·25 claims
- 3445US2015162117A1Sintered magnet and production process thereforHITACHI LTD·Filed 2012·Application pending·0 cites
- 3544US8764917B2Ferromagnetic compound magnetSUZUKI HIROYUKI·Filed 2010·Granted Jul 1, 2014·0 cites·2 claims
- 3644US7031123B2Magneto resistive head and magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Apr 18, 2006·0 cites·4 claims
- 3744US2015170809A1Sintered magnet and process for production thereofKOMURO MATAHIRO·Filed 2012·Application pending·0 cites
- 3843US2008008897A1Magnetic powder, soft magnetic composite, and method of forming sameIMAGAWA TAKAO·Filed 2007·Application pending·0 cites
- 3941US2012025651A1Sintered magnet and rotating electric machine using sameKOMURO MATAHIRO·Filed 2010·Application pending·0 cites
- 4040US2003091864A1Lamination comprising oxide layer, magnetoresistive head using the same, and magnetic recording and reproducing deviceFiled 2002·Application pending·0 cites
- 4139US5109312AMagnetic recording apparatus and magnetic head with superconducting materialHITACHI LTD·Filed 1990·Granted Apr 28, 1992·4 cites·14 claims
- 4239US2013076475A1Magnetic core and forming method thereofIMAGAWA TAKAO·Filed 2012·Application pending·0 cites
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