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发明名称
Book construction
摘要
申请公布号
US2502813(A)
申请公布日期
1950.04.04
申请号
US19460670917
申请日期
1946.05.20
申请人
EDWARD B. SMITH
发明人
ANDREW CARL L.
分类号
B42D1/00;B42D1/06
主分类号
B42D1/00
代理机构
代理人
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地址
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