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发明名称
Improvements in signs
摘要
申请公布号
GB408227(A)
申请公布日期
1934.04.03
申请号
GB19320021531
申请日期
1932.07.30
申请人
HENRY KEHRMANN
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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