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发明名称
Improvements in or relating to loose leaf bindings
摘要
申请公布号
GB493568(A)
申请公布日期
1938.10.11
申请号
GB19370016654
申请日期
1937.06.15
申请人
JAMES ADAMS KEENE
发明人
分类号
B42F13/00
主分类号
B42F13/00
代理机构
代理人
主权项
地址
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