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发明名称
Advertising device
摘要
申请公布号
US1840325(A)
申请公布日期
1932.01.12
申请号
US19300492293
申请日期
1930.10.30
申请人
MCCANN CLYDE D
发明人
MCCANN CLYDE D.
分类号
F21V8/00;G02B6/00
主分类号
F21V8/00
代理机构
代理人
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