Inventor · disambiguated record
Hirotsugu Fukuoka
Also filed as: FUKUOKA HIROTSUGU
27 granted patents·787 citations·filing 1987–2003
97Inventor score
Top patents by PatentIndex Score
27 records- 0198US5390061AMultilayer magnetoresistance effect-type magnetic headHITACHI LTD·Filed 1991·Granted Feb 14, 1995·156 cites·27 claims
- 0295US6687099B2Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force differenceHITACHI LTD·Filed 2002·Granted Feb 3, 2004·33 cites·10 claims
- 0394US5726837AMultilayer magnetoresistance effect-type magnetic headHITACHI LTD·Filed 1994·Granted Mar 10, 1998·43 cites·24 claims
- 0493US5568331AMethod of head positioning and magnetic recording disk drive using the sameHITACHI LTD·Filed 1990·Granted Oct 22, 1996·67 cites·22 claims
- 0591US5545021AHermetically sealed rotary compressor having an oil supply capillary passageMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Aug 13, 1996·50 cites·36 claims
- 0691US5325244AMagnetic recording data storage systemHITACHI LTD·Filed 1992·Granted Jun 28, 1994·55 cites·12 claims
- 0789US6011674AMagnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositionsHITACHI LTD·Filed 1996·Granted Jan 4, 2000·33 cites·6 claims
- 0888US6447274B1Rotary compressor having a cylinder block of sintered metalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Sep 10, 2002·50 cites·22 claims
- 0986US6483677B2Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effectHITACHI LTD·Filed 2001·Granted Nov 19, 2002·11 cites·6 claims
- 1083US5518381AClosed rotary compressorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted May 21, 1996·39 cites·12 claims
- 1179US6278593B1Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effectHITACHI LTD·Filed 1999·Granted Aug 21, 2001·17 cites·64 claims
- 1278US5563752AMagnetic recording and reproducing device using a giant magnetoresistive filmHITACHI LTD·Filed 1994·Granted Oct 8, 1996·41 cites·6 claims
- 1378US5461517AMagneto-resistance effect type of recording/reproducing headHITACHI LTD·Filed 1994·Granted Oct 24, 1995·27 cites·20 claims
- 1477US5695326ACompressor for a refrigeration machine having a thrust bearingMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Dec 9, 1997·28 cites·9 claims
- 1577US5685703AHermetically sealed rotary compressor having an oil supply passage to the compression compartmentMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Nov 11, 1997·25 cites·4 claims
- 1670US5541789AMagnetic recording apparatus with magnetic head on slider having applied load larger than buoyant force acting on slider so that gap between magnetic head and magnetic disk is smaller than total thickness of protective layer and lubricating layer on diskHITACHI LTD·Filed 1995·Granted Jul 30, 1996·23 cites·12 claims
- 1769US7054120B2Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effectHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted May 30, 2006·7 cites·7 claims
- 1867US5109311AMagnetic disk device and method of recording/retrieving informationHITACHI LTD·Filed 1991·Granted Apr 28, 1992·17 cites·38 claims
- 1963US4861398AMethod for making a thin film magnetic headHITACHI LTD·Filed 1987·Granted Aug 29, 1989·21 cites·6 claims
- 2060US6607372B2Refrigerating cycle or compressor having foreign matter collectorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Aug 19, 2003·4 cites·1 claims
- 2157US6450790B2Refrigerating cycle or compressor having foreign matter collectorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Sep 17, 2002·3 cites·2 claims
- 2257US5736235AMagnetic recording medium having at least two magnetic layers with easy axes oriented in the same directionHITACHI LTD·Filed 1991·Granted Apr 7, 1998·16 cites·15 claims
- 2351US5865607ARefrigerating cycle or compressor having foreign matter collectorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Feb 2, 1999·8 cites·3 claims
- 2449US6666667B2Refrigerating cycle or compressor having foreign matter collectorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Dec 23, 2003·2 cites·3 claims
- 2548US7354257B2Refrigerating cycle or compressor having foreign matter collectorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Apr 8, 2008·1 cites·1 claims
- 2648US5842846AHermetic type compressor having an oil feed partMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Dec 1, 1998·9 cites·2 claims
- 2747US6250898B1Refrigerating cycle or compressor having foreign matter collectorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Jun 26, 2001·1 cites·3 claims
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