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经营范围
发明名称
Improvements in reflecting signs
摘要
申请公布号
GB417230(A)
申请公布日期
1934.10.01
申请号
GB19340009564
申请日期
1934.03.27
申请人
ADOLF KAEMPFER
发明人
分类号
G09F13/14
主分类号
G09F13/14
代理机构
代理人
主权项
地址
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