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发明名称
TABULATOR FOR OPERATING UPON PRINTED INDEX POINTS
摘要
申请公布号
CA298947(A)
申请公布日期
1930.04.01
申请号
CAD298947
申请日期
申请人
THE TABULATING MACHINE COMPANY
发明人
MICHAEL MAUL
分类号
主分类号
代理机构
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