Inventor
YUZURIHARA HAJIME
JP31 patents
⚠️ This page may combine multiple inventors who share the name “YUZURIHARA HAJIME”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
28 patentsUS6426936B1Jul 30, 2002
Phase-change medium usable in phase-difference tracking
RICOH KK61 citations96
US6177167B1Jan 23, 2001
Optical information recording medium
RICOH KK51 citations96
US6096398AAug 1, 2000
Phase-change optical recording medium
RICOH KK58 citations96
US6841049B2Jan 11, 2005
Optical device substrate film-formation apparatus, optical disk substrate film-formation method, substrate holder manufacture method, substrate holder, optical disk and a phase-change recording type of optical disk
RICOH KK47 citations95
US6827999B2Dec 7, 2004
Optical information recording medium
RICOH KK29 citations92
US6790592B2Sep 14, 2004
Phase-change optical information recording medium
RICOH KK23 citations92
US6391417B1May 21, 2002
Optical information recording medium
RICOH KK36 citations92
US6770346B2Aug 3, 2004
Optical recording medium and recording method
RICOH KK40 citations91
US7507523B2Mar 24, 2009
Optical information recording medium, method of manufacturing the optical information recording medium, and method of and apparatus for recording/reproducing optical information
RICOH KK14 citations84
US6846611B2Jan 25, 2005
Phase-change optical recording medium
RICOH KK17 citations84
US7411887B2Aug 12, 2008
Optical information recording medium
RICOH KK7 citations74
US6914866B2Jul 5, 2005
Optical information recording medium and information recording method and apparatus using the recording medium
RICOH KK9 citations74
US6884487B2Apr 26, 2005
Optical recording medium, recording material, method of producing optical recording medium, and optical recording, reading and rewriting method
RICOH KK8 citations73
US6741545B2May 25, 2004
Phase-change medium usable in phase-difference tracking
RICOH KK6 citations73
US7417930B2Aug 26, 2008
Optical recording method
RICOH KK2 citations63
US7349315B2Mar 25, 2008
Information recording method, information recording device, optical information recording medium, program for recording information and storage medium
RICOH KK2 citations63
US7260044B2Aug 21, 2007
Recording method for a phase-change optical recording medium
RICOH KK3 citations63
US7042831B2May 9, 2006
Optical information recording medium
RICOH KK1 citations63
US7570563B2Aug 4, 2009
Optical recording method of a phase-change optical recording medium having improved recording characteristics and uniformity and optical recording medium and optical recorder used by the method
RICOH KK3 citations62
US7273534B2Sep 25, 2007
Optical device substrate film-formation apparatus, optical disk substrate film-formation method, substrate holder manufacture method, substrate holder, optical disk and a phase-change recording type of optical disk
RICOH KK4 citations62
US7063875B2Jun 20, 2006
Optical recording medium
RICOH KK3 citations62
US6963527B2Nov 8, 2005
Information recording method and optical recording medium therefor
RICOH KK2 citations62
US6958180B2Oct 25, 2005
Phase change optical recording medium
RICOH KK5 citations62
US7414954B2Aug 19, 2008
Optical information recording medium
RICOH KK0 citations52
US7364781B2Apr 29, 2008
Optical recording medium, recording material, method of producing optical recording medium and optical recording, reading and rewriting method
RICOH KK0 citations52
US7362683B2Apr 22, 2008
Optical recording method
RICOH KK0 citations52
US7611762B2Nov 3, 2009
Optical recording medium
RICOH KK0 citations51
US7068591B2Jun 27, 2006
Information recording method and optical recording medium therefor
RICOH KK0 citations51