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发明名称
Loose leaf binding
摘要
申请公布号
US2149838(A)
申请公布日期
1939.03.07
申请号
US19350043735
申请日期
1935.10.05
申请人
SPIRAL BINDING COMPANY, INC.
发明人
CATINI VINCENZO
分类号
B42F13/20
主分类号
B42F13/20
代理机构
代理人
主权项
地址
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