Improvements in or relating to circuit arrangements for receiving audio frequency control signals provided with audio prefix signals, for use in telecommunications systems,申请号GB19590009468-传众专利搜索

发明名称	Improvements in or relating to circuit arrangements for receiving audio frequency control signals provided with audio prefix signals, for use in telecommunications systems
摘要
申请公布号	GB893561(A)	申请公布日期	1962.04.11
申请号	GB19590009468	申请日期	1959.03.18
申请人	SIEMENS & HALSKE AKTIENGESELLSCHAFT	发明人
分类号	H04Q1/453;H04Q3/00	主分类号	H04Q1/453
代理机构		代理人
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