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发明名称
Improvements relating to signs
摘要
申请公布号
GB477000(A)
申请公布日期
1937.12.17
申请号
GB19360016904
申请日期
1936.06.17
申请人
FREDERICK JAMES COLES
发明人
分类号
G09F13/06
主分类号
G09F13/06
代理机构
代理人
主权项
地址
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