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发明名称
Improvements relating to party line telephone systems
摘要
申请公布号
GB711522(A)
申请公布日期
1954.07.07
申请号
GB19520008430
申请日期
1952.04.02
申请人
SIEMENS BROTHERS & CO. LIMITED
发明人
BARROW NORMAN;ROBERT BEATRICE MARY;EDWARDS HAROLD GEORGE
分类号
H04Q5/06
主分类号
H04Q5/06
代理机构
代理人
主权项
地址
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