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发明名称
Improvements in or relating to devices for advertising and like purposes
摘要
申请公布号
GB513236(A)
申请公布日期
1939.10.06
申请号
GB19380010264
申请日期
1938.04.04
申请人
RODERICK THOMAS RICHES;GEOFFREY HENRY RICHES
发明人
分类号
G09F11/00
主分类号
G09F11/00
代理机构
代理人
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