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经营范围
发明名称
Group indicating system
摘要
申请公布号
US1916986(A)
申请公布日期
1933.07.04
申请号
US19280326275
申请日期
1928.12.15
申请人
THE TABULATING MACHINE COMPANY
发明人
PAGE RALPH E.;LAKE CLAIR D.
分类号
主分类号
代理机构
代理人
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