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发明名称
Book attachment
摘要
申请公布号
US2089457(A)
申请公布日期
1937.08.10
申请号
US19350037540
申请日期
1935.08.23
申请人
WATERS CHARLES A
发明人
WATERS CHARLES A.
分类号
B42D3/14
主分类号
B42D3/14
代理机构
代理人
主权项
地址
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