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经营范围
发明名称
Improvements in or relating to marginally punched card indexes
摘要
申请公布号
GB978584(A)
申请公布日期
1964.12.23
申请号
GB19620032140
申请日期
1962.08.21
申请人
DOREC VERLAGS A.G.
发明人
分类号
G06K21/04
主分类号
G06K21/04
代理机构
代理人
主权项
地址
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