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发明名称
Number or letter carrying device
摘要
申请公布号
US2510331(A)
申请公布日期
1950.06.06
申请号
US19460708495
申请日期
1946.11.08
申请人
CROSBY EDWARD A
发明人
CROSBY EDWARD A.
分类号
G09F7/02
主分类号
G09F7/02
代理机构
代理人
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