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发明名称
Loose-leaf binder
摘要
申请公布号
US1754418(A)
申请公布日期
1930.04.15
申请号
US19270200787
申请日期
1927.06.23
申请人
DE LOSS NORMAN CLAYBAUGH
发明人
LOSS NORMAN CLAYBAUGH DE
分类号
B42F13/04
主分类号
B42F13/04
代理机构
代理人
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