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经营范围
发明名称
Loose leaf binder
摘要
申请公布号
US2895484(A)
申请公布日期
1959.07.21
申请号
US19570656144
申请日期
1957.04.30
申请人
WILLIAM GRAMACY
发明人
GRAMACY WILLIAM
分类号
B42F13/30
主分类号
B42F13/30
代理机构
代理人
主权项
地址
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