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发明名称
Improvements relating to electrically operated changing display indicators
摘要
申请公布号
GB659309(A)
申请公布日期
1951.10.24
申请号
GB19490001519
申请日期
1949.01.19
申请人
SIEMENS BROTHERS & CO. LIMITED;ALBERT MARTIN HAILEY
发明人
分类号
G09F11/00;G09F11/26
主分类号
G09F11/00
代理机构
代理人
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