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发明名称
Back-space and column-normalizing mechanism for card-perforating machines
摘要
申请公布号
US1798610(A)
申请公布日期
1931.03.31
申请号
US19270186718
申请日期
1927.04.26
申请人
REMINGTON RAND INC.
发明人
LASKER WILLIAM W.
分类号
G06K1/06
主分类号
G06K1/06
代理机构
代理人
主权项
地址
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