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发明名称
Invertible and adjustable picture holder
摘要
申请公布号
US2657488(A)
申请公布日期
1953.11.03
申请号
US19510217954
申请日期
1951.03.28
申请人
KNOX DAVID M
发明人
KNOX DAVID M.
分类号
A47G1/08
主分类号
A47G1/08
代理机构
代理人
主权项
地址
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