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发明名称
Binder for loose leaves
摘要
申请公布号
US1792740(A)
申请公布日期
1931.02.17
申请号
US19270172969
申请日期
1927.03.05
申请人
ARTHUR B. HULSAPPLE
发明人
HAYDEN HOWARD A.
分类号
B42F13/12
主分类号
B42F13/12
代理机构
代理人
主权项
地址
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