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发明名称
Punch for loose-leaf binders
摘要
申请公布号
US2445440(A)
申请公布日期
1948.07.20
申请号
US19450573673
申请日期
1945.01.20
申请人
KLEMM WILLIAM F
发明人
KLEMM WILLIAM F.
分类号
B42F13/40
主分类号
B42F13/40
代理机构
代理人
主权项
地址
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