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发明名称
Device for coding and decoding business survey cards
摘要
申请公布号
US2237968(A)
申请公布日期
1941.04.08
申请号
US19390291064
申请日期
1939.08.19
申请人
MOORE LORIS C
发明人
MOORE LORIS C.
分类号
G06K21/06
主分类号
G06K21/06
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代理人
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