Inventor
TANAHASHI KIWAMU
JP49 patents
⚠️ This page may combine multiple inventors who share the name “TANAHASHI KIWAMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
27 patentsUS6221508B1Apr 24, 2001
Magnetic recording media
HITACHI LTD47 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
US6759148B2Jul 6, 2004
Perpendicular magnetic recording media and magnetic storage apparatus using the same
HITACHI LTD26 citations93
US6723457B2Apr 20, 2004
Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the same
HITACHI LTD32 citations93
US6569545B1May 27, 2003
Magnetic recording medium and a magnetic storage apparatus
HITACHI LTD24 citations93
US6511761B1Jan 28, 2003
Magnetic recording media and magnetic storage apparatus
HITACHI LTD25 citations93
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
US6403240B1Jun 11, 2002
Magnetic recording media and magnetic recording system using the same
HITACHI LTD35 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
US6894856B2May 17, 2005
Magnetic recording medium, magnetic recording apparatus using the same, and method and apparatus for manufacturing the magnetic recording medium
HITACHI LTD16 citations84
US6544667B1Apr 8, 2003
Magnetic recording medium, producing method of the same and magnetic recording system
HITACHI LTD17 citations84
US7026810B2Apr 11, 2006
Method for testing or recording servo signal on perpendicular magnetic recording media
HITACHI LTD6 citations74
US6894488B2May 17, 2005
Method for testing or recording servo signal on perpendicular magnetic recording media
HITACHI LTD9 citations74
US6858330B2Feb 22, 2005
Perpendicular magnetic recording media and magnetic storage apparatus using the same
HITACHI LTD9 citations74
US6808824B2Oct 26, 2004
Perpendicular magnetic recording media
HITACHI LTD9 citations74
US6583958B1Jun 24, 2003
Magnetic recording medium and magnetic storage system using same
HITACHI LTD11 citations74
US6574060B2Jun 3, 2003
Magnetic storage apparatus
HITACHI LTD9 citations74
US6349008B1Feb 19, 2002
Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same
HITACHI LTD11 citations74
US5875082AFeb 23, 1999
Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same
HITACHI LTD12 citations74
US6596420B2Jul 22, 2003
Magnetic recording media and magnetic recording system using the same
HITACHI LTD12 citations73
US6924048B2Aug 2, 2005
Magnetic recording medium and a magnetic storage apparatus
HITACHI LTD4 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
US7138195B2Nov 21, 2006
Perpendicular magnetic recording media and magnetic storage
HITACHI LTD1 citations52
HITACHI GLOBAL STORAGE TECH
10 patentsUS7217467B2May 15, 2007
Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus
HITACHI GLOBAL STORAGE TECH11 citations84
US7153596B2Dec 26, 2006
Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic storage apparatus using the same
HITACHI GLOBAL STORAGE TECH14 citations84
US7056604B2Jun 6, 2006
Magnetic recording media and magnetic recording system using the same
HITACHI GLOBAL STORAGE TECH11 citations84
US6709768B2Mar 23, 2004
Magnetic recording medium and its manufacturing method and magnetic recording system using such a magnetic recording medium
HITACHI GLOBAL STORAGE TECH13 citations84
US7153546B2Dec 26, 2006
Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the same
HITACHI GLOBAL STORAGE TECH6 citations74
US7041393B2May 9, 2006
Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the same
HITACHI GLOBAL STORAGE TECH7 citations74
US7182974B2Feb 27, 2007
Magnetic recording medium and its manufacturing method and magnetic recording system using such a magnetic recording medium
HITACHI GLOBAL STORAGE TECH3 citations63
US7050253B2May 23, 2006
Magnetic recording media and magnetic storage apparatus using the same
HITACHI GLOBAL STORAGE TECH4 citations63
US7316852B2Jan 8, 2008
Perpendicular magnetic recording media
HITACHI GLOBAL STORAGE TECH0 citations52
US7641774B2Jan 5, 2010
Manufacturing process for perpendicular magnetic recording medium
HITACHI GLOBAL STORAGE TECH0 citations42
TONOOKA SHUN
2 patentsHITACHI GLOBAL STORAGE TECH NL
2 patentsUS8000060B2Aug 16, 2011
Perpendicular magnetic recording medium and system having a magnetic recording layer with a perpendicular recording layer, a magnetic coupling layer, and a writing assist layer
HITACHI GLOBAL STORAGE TECH NL7 citations79
US7875371B2Jan 25, 2011
Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the same
HITACHI GLOBAL STORAGE TECH NL5 citations62