Inventor
NAKATANI RYOICHI
JP33 patents
⚠️ This page may combine multiple inventors who share the name “NAKATANI RYOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
26 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
US6232777B1May 15, 2001
Tunneling magnetoresistive element and magnetic sensor using the same
HITACHI LTD52 citations96
US6201259B1Mar 13, 2001
Tunneling magnetoresistance element, and magnetic sensor, magnetic head and magnetic memory using the element
HITACHI LTD81 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
US5287237AFeb 15, 1994
Antiferromagnetic film superior in corrosion resistance, magnetoresistance-effect element and magnetoresistance-effect head including such thin film
HITACHI LTD71 citations96
US6483676B2Nov 19, 2002
Magnetic head with tunneling magnetoresistive element biased by current controller
HITACHI LTD14 citations92
US6469873B1Oct 22, 2002
Magnetic head and magnetic storage apparatus using the same
HITACHI LTD35 citations92
US6392849B2May 21, 2002
Magnetic head with dual spin valve element for differential operation
HITACHI LTD22 citations92
US6278593B1Aug 21, 2001
Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect
HITACHI LTD17 citations92
US5998040ADec 7, 1999
Multilayer which shows magnetoresistive effect and magnetoresistive element using the same
HITACHI LTD49 citations92
US5290629AMar 1, 1994
Magnetic film having a magnetic phase with crystallites of 200 A or less and an oxide phase present at the grain boundaries
HITACHI LTD32 citations92
US4935311AJun 19, 1990
Magnetic multilayered film and magnetic head using the same
HITACHI LTD36 citations92
US6483677B2Nov 19, 2002
Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effect
HITACHI LTD11 citations82
US4935314AJun 19, 1990
Ferromagnetic film and magnetic head using the same
HITACHI LTD22 citations82
US4858049AAug 15, 1989
Magnetic film and magnetic head using the same
HITACHI LTD19 citations82
US6525532B2Feb 25, 2003
Magnetic device
HITACHI LTD6 citations74
US6418001B1Jul 9, 2002
Tunneling magnetoresistive element using a bias magnetic field
HITACHI LTD8 citations74
US6339330B1Jan 15, 2002
Magnetic head
HITACHI LTD6 citations74
US5879798AMar 9, 1999
Heat resistant, high saturation magnetic flux density film
HITACHI LTD6 citations74
US4920013AApr 24, 1990
Magnetic Multilayer structure
HITACHI LTD18 citations74
US4891278AJan 2, 1990
Ferrromagnetic thin film and magnetic head using it
HITACHI LTD15 citations72
US5247415ASep 21, 1993
Magnetic head having main and auxiliary magnetic paths
HITACHI LTD6 citations63
US6771474B2Aug 3, 2004
Magnetic head with tunneling multi-layer magnetoresistive element biased by current controller
HITACHI LTD0 citations52
US6556393B2Apr 29, 2003
Magnetic recording apparatus with tunneling magnetoresistive element biased by current controller
HITACHI LTD0 citations52
UNIV OSAKA
3 patentsUS7099185B2Aug 29, 2006
Magnetic memory array, method for recording in a magnetic memory array and method for reading out from a magnetic memory array
UNIV OSAKA12 citations84
US6940750B2Sep 6, 2005
Magnetic memory, magnetic memory array, method for fabricating a magnetic memory, method for recording in a magnetic memory and method for reading out from a magnetic memory
UNIV OSAKA11 citations74
US6950332B2Sep 27, 2005
Magnetic memory element with vortex magnetization to control magnetization rotation and prevent leakage of magnetic flux
UNIV OSAKA4 citations63
HITACHI GLOBAL STORAGE TECH
3 patentsUS7292417B2Nov 6, 2007
Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect
HITACHI GLOBAL STORAGE TECH3 citations74
US7159303B2Jan 9, 2007
Method for manufacturing magnetic head device
HITACHI GLOBAL STORAGE TECH7 citations74
US7054120B2May 30, 2006
Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect
HITACHI GLOBAL STORAGE TECH7 citations74