Centralized street signalling system,申请号GB19490023520-传众专利搜索

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发明名称	Centralized street signalling system
摘要
申请公布号	GB673106(A)	申请公布日期	1952.06.04
申请号	GB19490023520	申请日期	1949.09.12
申请人	TELEFONAKTIEBOLAGET L.M. ERICSSON	发明人
分类号	G08G1/081	主分类号	G08G1/081
代理机构		代理人
主权项
地址

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