Inventor
KUGIYA FUMIO
JP22 patents
⚠️ This page may combine multiple inventors who share the name “KUGIYA FUMIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
21 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
US5848045ADec 8, 1998
Method for recording and reading an optical disk
HITACHI LTD70 citations96
US5766718AJun 16, 1998
Longitudinal magnetic recording medium and apparatus
HITACHI LTD70 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
US5703855ADec 30, 1997
Optical disk apparatus and recording and reading method for an optical disk using the same
HITACHI LTD61 citations95
US5513165AApr 30, 1996
Method for controlling the farm of a magnetic domain of a magneto-optical disk using pre-write testing
HITACHI LTD90 citations95
US5463600AOct 31, 1995
Magneto-optical recording system using recording waveform having a plurality of power levels providing high recording density
HITACHI LTD40 citations93
US5093822AMar 3, 1992
High-density magnetic recording and optical reproducing apparatus
HITACHI LTD39 citations93
US6278593B1Aug 21, 2001
Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect
HITACHI LTD17 citations92
US5420846AMay 30, 1995
Recording medium having a plurality of nonlinear transmission characteristics
HITACHI LTD20 citations92
US6490123B1Dec 3, 2002
Disc drive having 3.5 inch form factor housing and 2.5 inch form factor disk media
HITACHI LTD43 citations91
US7227818B1Jun 5, 2007
Magneto-optical data recording/reproducing method
HITACHI LTD11 citations84
US6483677B2Nov 19, 2002
Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effect
HITACHI LTD11 citations82
US5736235AApr 7, 1998
Magnetic recording medium having at least two magnetic layers with easy axes oriented in the same direction
HITACHI LTD16 citations74
US5083226AJan 21, 1992
Magnetic disk drive
HITACHI LTD9 citations74
US4777553AOct 11, 1988
Magnetic head
HITACHI LTD7 citations74
US4755891AJul 5, 1988
Circuit for processing waveform of reproduced signal in magnetic reproducing apparatus
HITACHI LTD7 citations74