Inventor
YAHISA YOTSUO
JP37 patents
⚠️ This page may combine multiple inventors who share the name “YAHISA YOTSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
24 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
US5143794ASep 1, 1992
Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus
HITACHI LTD49 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
US5236791AAug 17, 1993
Magnetic recording medium and magnetic storage
HITACHI LTD58 citations95
US6403240B1Jun 11, 2002
Magnetic recording media and magnetic recording system using the same
HITACHI LTD35 citations92
US6372367B1Apr 16, 2002
Magnetic recording medium, method for producing the same and magnetic recording apparatus using the same
HITACHI LTD20 citations92
US6335103B1Jan 1, 2002
Magnetic recording media for longitudinal recording
HITACHI LTD21 citations92
US6096445AAug 1, 2000
Substrate for a magnetic recording medium, the magnetic recording medium, and a method of producing the same
HITACHI LTD29 citations92
US5723198AMar 3, 1998
Multi-layered magnetic recording medium and magnetic recording system employing the same
HITACHI LTD29 citations92
US5665478ASep 9, 1997
Magnetic recording media for longitudinal recording
HITACHI LTD32 citations92
US6623874B2Sep 23, 2003
Magnetic recording medium and magnetic recording apparatus
HITACHI LTD20 citations91
US6627253B2Sep 30, 2003
Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus
HITACHI LTD16 citations84
US6544667B1Apr 8, 2003
Magnetic recording medium, producing method of the same and magnetic recording system
HITACHI LTD17 citations84
US6197367B1Mar 6, 2001
Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storage
HITACHI LTD13 citations74
US6887565B2May 3, 2005
Magnetic recording medium and magnetic storage device
HITACHI LTD5 citations73
US6596420B2Jul 22, 2003
Magnetic recording media and magnetic recording system using the same
HITACHI LTD12 citations73
US5906884AMay 25, 1999
Magnetic recording medium
HITACHI LTD13 citations72
US5618639AApr 8, 1997
Magnetic recording medium and magnetic recording apparatus
HITACHI LTD17 citations71
US6623873B1Sep 23, 2003
Magnetic recording medium and magnetic disk apparatus using the same
HITACHI LTD4 citations63
US7005202B2Feb 28, 2006
Magnetic recording medium and magnetic recording apparatus
HITACHI LTD3 citations61
US7338725B2Mar 4, 2008
Magnetic recording medium and magnetic storage device
HITACHI LTD0 citations52
US6703148B2Mar 9, 2004
Magnetic recording medium and magnetic disk apparatus using the same
HITACHI LTD0 citations52
HITACHI GLOBAL STORAGE TECH
9 patentsUS6830837B2Dec 14, 2004
Magnetic recording medium and magnetic recording apparatus
HITACHI GLOBAL STORAGE TECH20 citations92
US7056604B2Jun 6, 2006
Magnetic recording media and magnetic recording system using the same
HITACHI GLOBAL STORAGE TECH11 citations84
US6884521B2Apr 26, 2005
Magnetic recording medium with controlled grain diameters and method for manufacturing the same
HITACHI GLOBAL STORAGE TECH12 citations84
US7261958B2Aug 28, 2007
Magnetic recording medium and magnetic recording system using the same
HITACHI GLOBAL STORAGE TECH8 citations74
US7267894B2Sep 11, 2007
Magnetic recording medium and magnetic recording apparatus
HITACHI GLOBAL STORAGE TECH2 citations62
US7163756B2Jan 16, 2007
Magnetic recording medium
HITACHI GLOBAL STORAGE TECH5 citations62
US7249405B2Jul 31, 2007
Method for manufacturing a magnetic medium
HITACHI GLOBAL STORAGE TECH1 citations52
US6692843B2Feb 17, 2004
Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storage
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