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发明名称
Improvements in or relating to electric signalling systems
摘要
申请公布号
GB557077(A)
申请公布日期
1943.11.03
申请号
GB19420005819
申请日期
1942.04.30
申请人
STANDARD TELEPHONES AND CABLES LIMITED;ERNEST FREDERICK BATES
发明人
分类号
G08B17/06;G08B29/06
主分类号
G08B17/06
代理机构
代理人
主权项
地址
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