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发明名称
Projection arrangement for advertising purposes
摘要
申请公布号
US1811956(A)
申请公布日期
1931.06.30
申请号
US19290364581
申请日期
1929.05.20
申请人
ERIK MOERCH
发明人
MOERCH ERIK
分类号
G09F19/18
主分类号
G09F19/18
代理机构
代理人
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