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发明名称
Bookstand
摘要
申请公布号
US1821802(A)
申请公布日期
1931.09.01
申请号
US19280267907
申请日期
1928.04.06
申请人
PRESSED & WELDED STEEL PRODUCTS CO.
发明人
HASKIN WALTER E.
分类号
A47B19/04
主分类号
A47B19/04
代理机构
代理人
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地址
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