Inventor
USHIYAMA JUNKO
JP38 patents
⚠️ This page may combine multiple inventors who share the name “USHIYAMA JUNKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
32 patentsUS6236635B1May 22, 2001
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD93 citations99
US9275672B2Mar 1, 2016
Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk drive
HITACHI LTD87 citations98
US7012871B2Mar 14, 2006
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD40 citations96
US6529467B2Mar 4, 2003
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD25 citations96
US6343056B2Jan 29, 2002
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD23 citations96
US6231945B1May 15, 2001
Information recording medium
HITACHI LTD50 citations96
US6842412B2Jan 11, 2005
Information recording method and optical disc apparatus
HITACHI LTD44 citations93
US6703098B2Mar 9, 2004
Information recording medium and method for manufacturing information recording medium
HITACHI LTD20 citations93
US6709801B2Mar 23, 2004
Information recording medium
HITACHI LTD25 citations92
US6636477B1Oct 21, 2003
Information recording medium and information recording device
HITACHI LTD37 citations92
US5886969AMar 23, 1999
High-density information recording/reproducing method
HITACHI LTD17 citations92
US5835469ANov 10, 1998
High-density information recording/reproducing method
HITACHI LTD24 citations92
US6312779B1Nov 6, 2001
Information recording medium and information recording/reproducing apparatus
HITACHI LTD40 citations91
US6775226B1Aug 10, 2004
Optical recording medium having a plurality of interference layers of different refractive index
HITACHI LTD16 citations84
US6608806B2Aug 19, 2003
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD8 citations82
US7907490B2Mar 15, 2011
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD2 citations74
US7529165B2May 5, 2009
Test writing method and information recording device
HITACHI LTD7 citations74
US6436504B2Aug 20, 2002
Information recording medium
HITACHI LTD8 citations74
US6806030B2Oct 19, 2004
Information recording medium and method for manufacturing information recording medium
HITACHI LTD11 citations73
US7751293B2Jul 6, 2010
Test-write method, information recording method, and information recording apparatus
HITACHI LTD4 citations63
US7688696B2Mar 30, 2010
Information recording method and information recording device
HITACHI LTD4 citations63
US7016282B2Mar 21, 2006
Information recording method and optical disk unit
HITACHI LTD4 citations63
US6842415B2Jan 11, 2005
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD1 citations63
US6740382B2May 25, 2004
Information recording medium
HITACHI LTD1 citations63
US7957240B2Jun 7, 2011
Test writing method and information recording device
HITACHI LTD0 citations52
US7911910B2Mar 22, 2011
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD0 citations52
US7907491B2Mar 15, 2011
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD0 citations52
US7852727B2Dec 14, 2010
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD0 citations52
US7764583B2Jul 27, 2010
Information recording method and information recording device
HITACHI LTD1 citations52
US7684301B2Mar 23, 2010
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD0 citations52
US7417933B2Aug 26, 2008
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD0 citations52
US7042823B2May 9, 2006
Information recording method and apparatus with suppressed mark edge jitters
HITACHI LTD0 citations52