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摘要
申请公布号
US1772180(A)
申请公布日期
1930.08.05
申请号
US19280321291
申请日期
1928.11.23
申请人
THE TABULATING MACHINE COMPANY
发明人
FORD EUGENE A.
分类号
G06K13/103
主分类号
G06K13/103
代理机构
代理人
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