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发明名称
Loose leaf binders
摘要
申请公布号
US2894513(A)
申请公布日期
1959.07.14
申请号
US19560562326
申请日期
1956.01.30
申请人
F. SOENNECKEN
发明人
GEMPE ERICH;HEIMLICH ERNST
分类号
B42F13/24
主分类号
B42F13/24
代理机构
代理人
主权项
地址
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