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发明名称
Portable sign frame
摘要
申请公布号
US1858152(A)
申请公布日期
1932.05.10
申请号
US19300446722
申请日期
1930.04.23
申请人
STANDARD PRESSED STEEL CO.
发明人
HALLOWELL HOWARD T.;BENNETT FRANK
分类号
G09F1/12
主分类号
G09F1/12
代理机构
代理人
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地址
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