Inventor
IWASA HIROYUKI
JP18 patents
⚠️ This page may combine multiple inventors who share the name “IWASA HIROYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
9 patentsUS7601481B2Oct 13, 2009
Multilayer phase-change information recording medium, and method for recording and reproducing using the same
RICOH KK16 citations84
US7260053B2Aug 21, 2007
Optical recording medium, process for manufacturing the same, sputtering target for manufacturing the same, and optical recording process using the same
RICOH KK14 citations83
US7613091B2Nov 3, 2009
Method for identifying double-layer disc and optical disc apparatus
RICOH KK4 citations62
US7464390B2Dec 9, 2008
Optical information recording medium, and recording and reproducing apparatus of the same
RICOH KK4 citations62
US7439007B2Oct 21, 2008
Phase change information recording medium having multiple layers and recording and playback method for the medium
RICOH KK2 citations62
US7042830B2May 9, 2006
Phase-change optical information recording medium, and optical information recording and reproducing apparatus and method for the same
RICOH KK2 citations62
US7005172B2Feb 28, 2006
Optical information recording medium and method for producing the same
RICOH KK4 citations62
US7491436B2Feb 17, 2009
Optical information recording medium
RICOH KK0 citations52
US7767284B2Aug 3, 2010
Optical recording medium, and, method for manufacturing the same, and method and apparatus for optical recording and reproducing thereof
RICOH KK0 citations42