Inventor
YAMAMOTO TOMOO
JP39 patents
⚠️ This page may combine multiple inventors who share the name “YAMAMOTO TOMOO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
25 patentsUS5815343ASep 29, 1998
Magnetic recording medium, process for producing the same and magnetic recording system
HITACHI LTD77 citations96
US5605733AFeb 25, 1997
Magnetic recording medium, method for its production, and system for its use
HITACHI LTD70 citations96
US6057021AMay 2, 2000
Magnetic recording media and magnetic recording system using the same
HITACHI LTD42 citations95
US5750230AMay 12, 1998
Magnetic recording media and magnetic recording system using the same
HITACHI LTD44 citations95
US6001447ADec 14, 1999
Longitudinal magnetic recording media and magnetic storage apparatus using the same
HITACHI LTD34 citations93
US5922456AJul 13, 1999
Longitudal magnetic recording medium having a multi-layered underlayer and magnetic storage apparatus using such magnetic recording medium
HITACHI LTD38 citations93
US5759681AJun 2, 1998
Magnetic recording medium and magnetic recording system using the same
HITACHI LTD53 citations93
US6638648B2Oct 28, 2003
Perpendicular magnetic recording medium and magnetic storage apparatus using the same
HITACHI LTD27 citations92
US6403240B1Jun 11, 2002
Magnetic recording media and magnetic recording system using the same
HITACHI LTD35 citations92
US6177208B1Jan 23, 2001
Magnetic recording system and magnetic recording medium used therefor
HITACHI LTD24 citations92
US6080476AJun 27, 2000
Magnetic recording medium and magnetic recording system using such a magnetic recording medium
HITACHI LTD32 citations92
US5723198AMar 3, 1998
Multi-layered magnetic recording medium and magnetic recording system employing the same
HITACHI LTD29 citations92
US5650889AJul 22, 1997
Magnetic recording medium containing heavy rare gas atoms, and a magnetic transducing system using the medium
HITACHI LTD40 citations92
US6706426B1Mar 16, 2004
Longitudinal magnetic recording media
HITACHI LTD14 citations84
US5919581AJul 6, 1999
Magnetic recording system and magnetic recording medium used therefor
HITACHI LTD16 citations81
US6613428B2Sep 2, 2003
Magnetic recording medium and magnetic recording and reproducing apparatus wherein the magnetic layer has a fluctuation of field; A or Hf of not less than 30 Oersteds
HITACHI LTD4 citations74
US6544672B1Apr 8, 2003
Magnetic recording medium and magnetic storage
HITACHI LTD12 citations74
US6310748B1Oct 30, 2001
Magnetic thin film magnetic recording medium
HITACHI LTD5 citations74
US6251532B1Jun 26, 2001
Magnetic recording medium and magnetic storage device using the same
HITACHI LTD11 citations74
US6596420B2Jul 22, 2003
Magnetic recording media and magnetic recording system using the same
HITACHI LTD12 citations73
US6846577B2Jan 25, 2005
Magnetic recording medium possessing a fluctuation field of not less than 30 Oe
HITACHI LTD2 citations63
US6605374B2Aug 12, 2003
Magnetic recording medium and magnetic recording system using such a magnetic recording medium
HITACHI LTD3 citations63
US6403242B1Jun 11, 2002
Magnetic recording medium and magnetic recording system using such a magnetic recording medium
HITACHI LTD2 citations63
US6627255B2Sep 30, 2003
Method of manufacturing a magnetic recording media
HITACHI LTD0 citations52
US6365287B1Apr 2, 2002
Magnetic recording media and magnetic storage device
HITACHI LTD0 citations52
HITACHI GLOBAL STORAGE TECH
9 patentsUS7056604B2Jun 6, 2006
Magnetic recording media and magnetic recording system using the same
HITACHI GLOBAL STORAGE TECH11 citations84
US7532436B2May 12, 2009
Magnetic recording medium and magnetic memory device for high density recording
HITACHI GLOBAL STORAGE TECH7 citations73
US7163756B2Jan 16, 2007
Magnetic recording medium
HITACHI GLOBAL STORAGE TECH5 citations62
US7273667B2Sep 25, 2007
Longitudinal multi-layer magnetic recording medium
HITACHI GLOBAL STORAGE TECH1 citations52
US7157162B2Jan 2, 2007
Magnetic recording medium and magnetic recording and reproducing apparatus
HITACHI GLOBAL STORAGE TECH0 citations52
US7115329B1Oct 3, 2006
Magnetic recording medium and magnetic storage device
HITACHI GLOBAL STORAGE TECH1 citations52
US6881504B2Apr 19, 2005
Perpendicular magnetic recording medium and magnetic storage apparatus using the same
HITACHI GLOBAL STORAGE TECH1 citations52
US7545604B2Jun 9, 2009
Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using same
HITACHI GLOBAL STORAGE TECH0 citations49
US7645528B2Jan 12, 2010
Magnetic recording media with ultra-high recording density
HITACHI GLOBAL STORAGE TECH0 citations41