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经营范围
发明名称
OPTICAL DISK
摘要
申请公布号
JPH03142717(A)
申请公布日期
1991.06.18
申请号
JP19890280403
申请日期
1989.10.27
申请人
RICOH CO LTD
发明人
SHIMIZU AKIHIKO
分类号
G11B7/00;G11B7/0037;G11B7/004;G11B7/013;G11B7/095;G11B7/24
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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