Inventor
FUKUOKA HIROTSUGU
JP27 patents
⚠️ This page may combine multiple inventors who share the name “FUKUOKA HIROTSUGU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
14 patentsUS5390061AFeb 14, 1995
Multilayer magnetoresistance effect-type magnetic head
HITACHI LTD156 citations99
US6687099B2Feb 3, 2004
Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force difference
HITACHI LTD33 citations96
US6011674AJan 4, 2000
Magnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositions
HITACHI LTD33 citations96
US5726837AMar 10, 1998
Multilayer magnetoresistance effect-type magnetic head
HITACHI LTD43 citations96
US5568331AOct 22, 1996
Method of head positioning and magnetic recording disk drive using the same
HITACHI LTD67 citations96
US5325244AJun 28, 1994
Magnetic recording data storage system
HITACHI LTD55 citations96
US6278593B1Aug 21, 2001
Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect
HITACHI LTD17 citations92
US5563752AOct 8, 1996
Magnetic recording and reproducing device using a giant magnetoresistive film
HITACHI LTD41 citations92
US5541789AJul 30, 1996
Magnetic 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 disk
HITACHI LTD23 citations92
US5461517AOct 24, 1995
Magneto-resistance effect type of recording/reproducing head
HITACHI LTD27 citations92
US6483677B2Nov 19, 2002
Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effect
HITACHI LTD11 citations82
US4861398AAug 29, 1989
Method for making a thin film magnetic head
HITACHI LTD21 citations80
US5736235AApr 7, 1998
Magnetic recording medium having at least two magnetic layers with easy axes oriented in the same direction
HITACHI LTD16 citations74
US5109311AApr 28, 1992
Magnetic disk device and method of recording/retrieving information
HITACHI LTD17 citations73
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
12 patentsUS5545021AAug 13, 1996
Hermetically sealed rotary compressor having an oil supply capillary passage
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD50 citations96
US5685703ANov 11, 1997
Hermetically sealed rotary compressor having an oil supply passage to the compression compartment
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD25 citations93
US5695326ADec 9, 1997
Compressor for a refrigeration machine having a thrust bearing
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD28 citations92
US5518381AMay 21, 1996
Closed rotary compressor
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD39 citations92
US6447274B1Sep 10, 2002
Rotary compressor having a cylinder block of sintered metal
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD50 citations89
US6607372B2Aug 19, 2003
Refrigerating cycle or compressor having foreign matter collector
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations74
US6450790B2Sep 17, 2002
Refrigerating cycle or compressor having foreign matter collector
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations74
US5865607AFeb 2, 1999
Refrigerating cycle or compressor having foreign matter collector
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations74
US5842846ADec 1, 1998
Hermetic type compressor having an oil feed part
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations74
US7354257B2Apr 8, 2008
Refrigerating cycle or compressor having foreign matter collector
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD1 citations63
US6666667B2Dec 23, 2003
Refrigerating cycle or compressor having foreign matter collector
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations63
US6250898B1Jun 26, 2001
Refrigerating cycle or compressor having foreign matter collector
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD1 citations63