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发明名称
Bookholder
摘要
申请公布号
US2445864(A)
申请公布日期
1948.07.27
申请号
US19460708509
申请日期
1946.11.08
申请人
FRANK SEIDEL
发明人
SEIDEL FRANK
分类号
A47B19/04
主分类号
A47B19/04
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