| http://www.w3.org/ns/prov#value | - 7 Sep 20021 May 2003Ricoh Company, Ltd.Information recording mediumUS2003012445924 Oct 20023 Jul 2003Ricoh Company, Ltd.Substrate in which at least one of a groove and a pit is formed; a recording layer located overlying the substrate and including a dye; and a reflection layer located overlying the recording layer, wherein the optical information recordingUS200302149027 Mar 200320 Nov 2003Katsuyu
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