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发明名称
Improvements in and relating to multi-channel, privacy signalling systems
摘要
申请公布号
GB652363(A)
申请公布日期
1951.04.25
申请号
GB19470007998
申请日期
1947.03.24
申请人
THE GENERAL ELECTRIC COMPANY LIMITED;MAURICE MOISE LEVY
发明人
分类号
H04J3/04
主分类号
H04J3/04
代理机构
代理人
主权项
地址
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