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经营范围
发明名称
Improvements in or connected with luminous letter or numeral indicators or signals
摘要
申请公布号
GB326637(A)
申请公布日期
1930.03.20
申请号
GB19290005529
申请日期
1929.02.19
申请人
REGINALD WALLACE;THE BRITISH AUTOMATIC TOTALISATOR LIMITED
发明人
分类号
G09F9/307
主分类号
G09F9/307
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代理人
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