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经营范围
发明名称
DATAREGISTRERINGSMEDIUM
摘要
A data registration medium for optical data storage comprises a rectangular card (1) preferably of the same kind as a credit card. The area where data is stored is an annular portion (2) with a width (d) which is much less than its diameter.
申请公布号
SE8501342(D0)
申请公布日期
1985.03.19
申请号
SE19850001342
申请日期
1985.03.19
申请人
TELEFON AB L M ERICSSON
发明人
H * MALMKVIST
分类号
G06K19/06;B42D15/10;G06K7/14;G06K19/14;G11B7/0033;G11B7/0037;G11B7/24
主分类号
G06K19/06
代理机构
代理人
主权项
地址
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