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发明名称
Summary card punches
摘要
申请公布号
US2799452(A)
申请公布日期
1957.07.16
申请号
US19540408123
申请日期
1954.02.04
申请人
MICHAEL MAUL
发明人
MAUL MICHAEL
分类号
主分类号
代理机构
代理人
主权项
地址
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