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发明名称
Improvements in or relating to automatic signalling systems
摘要
申请公布号
GB696988(A)
申请公布日期
1953.09.09
申请号
GB19510025674
申请日期
1951.11.02
申请人
PHILIPS ELECTRICAL INDUSTRIES LIMITED
发明人
分类号
H03C1/50;H03F3/28;H04Q3/00
主分类号
H03C1/50
代理机构
代理人
主权项
地址
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