Improvements in or relating to telecommunication exchange circuit arrangements,申请号GB19550027501-传众专利搜索

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发明名称	Improvements in or relating to telecommunication exchange circuit arrangements
摘要
申请公布号	GB771101(A)	申请公布日期	1957.03.27
申请号	GB19550027501	申请日期	1955.09.27
申请人	SIEMENS & HALSKE AKTIENGESELLSCHAFT	发明人
分类号	H04M3/523	主分类号	H04M3/523
代理机构		代理人
主权项
地址

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