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发明名称
Card holder
摘要
申请公布号
US1757440(A)
申请公布日期
1930.05.06
申请号
US19290334263
申请日期
1929.01.22
申请人
CRAWFORD SHARP HERBERT
发明人
SHARP HERBERT CRAWFORD
分类号
G09F3/18
主分类号
G09F3/18
代理机构
代理人
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