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发明名称
Method of making film record cards
摘要
申请公布号
US2587022(A)
申请公布日期
1952.02.26
申请号
US19450610813
申请日期
1945.08.14
申请人
FILM 'N FILE, INC.
发明人
LANGAN JOHN F.
分类号
G03B21/64;G06K19/02
主分类号
G03B21/64
代理机构
代理人
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地址
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