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发明名称
Improvements in or relating to electric signalling systems
摘要
申请公布号
GB655546(A)
申请公布日期
1951.07.25
申请号
GB19470011452
申请日期
1948.04.23
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
WRIGHT ESMOND PHILIP GOODWIN;HASSELT MARC VAN;WEIR DONALD ADAMS
分类号
H04Q1/446
主分类号
H04Q1/446
代理机构
代理人
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地址
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