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发明名称
Improvements in or relating to advertisement devices
摘要
申请公布号
GB518512(A)
申请公布日期
1940.02.29
申请号
GB19380015301
申请日期
1938.05.23
申请人
EGON MAY;DERK BRUININKWEERD;HENDRIK GERARDUS OUWERKERK
发明人
分类号
G09F11/23
主分类号
G09F11/23
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代理人
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