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经营范围
发明名称
Improvements in changing picture or advertising machines
摘要
申请公布号
GB327648(A)
申请公布日期
1930.04.10
申请号
GB19290020738
申请日期
1929.07.05
申请人
GEORGE PERCIVAL KENT
发明人
分类号
G09F11/29
主分类号
G09F11/29
代理机构
代理人
主权项
地址
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