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发明名称
Card structure and method of making same
摘要
申请公布号
US2612711(A)
申请公布日期
1952.10.07
申请号
US19490100793
申请日期
1949.06.23
申请人
FILMSORT, INC.
发明人
BAKER LEONARD
分类号
G06K19/02
主分类号
G06K19/02
代理机构
代理人
主权项
地址
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