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发明名称
Statistical card punch
摘要
申请公布号
US2172758(A)
申请公布日期
1939.09.12
申请号
US19380216942
申请日期
1938.07.01
申请人
REMINGTON RAND INC.
发明人
RICE RAYMOND E.;KELLEY WALTER F.
分类号
主分类号
代理机构
代理人
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