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经营范围
发明名称
Improvements in signs
摘要
申请公布号
GB661529(A)
申请公布日期
1951.11.21
申请号
GB19490024615
申请日期
1949.09.26
申请人
HERBERT GRANGER
发明人
分类号
G09F7/00;G09F15/00
主分类号
G09F7/00
代理机构
代理人
主权项
地址
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