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发明名称
Improvements in and relating to advertising and like devices
摘要
申请公布号
GB495412(A)
申请公布日期
1938.11.14
申请号
GB19370013624
申请日期
1937.05.14
申请人
JOHN OLIVER BROOKS
发明人
分类号
G09F13/00
主分类号
G09F13/00
代理机构
代理人
主权项
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