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发明名称
Improvements in and connected with advertising devices
摘要
申请公布号
GB337195(A)
申请公布日期
1930.10.30
申请号
GB19290033095
申请日期
1929.10.31
申请人
MAC CHANGERS (1929) LIMITED;CHARLES ISAAC HUBBARD
发明人
分类号
G09F11/12
主分类号
G09F11/12
代理机构
代理人
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地址
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