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发明名称
Paper punch
摘要
申请公布号
US2524583(A)
申请公布日期
1950.10.03
申请号
US19470722025
申请日期
1947.01.14
申请人
YERKES JOHN A
发明人
YERKES JOHN A.
分类号
B26F1/36
主分类号
B26F1/36
代理机构
代理人
主权项
地址
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