Improvements in or relating to telephone systems,申请号GB19560036953-传众专利搜索

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发明名称	Improvements in or relating to telephone systems
摘要
申请公布号	GB794960(A)	申请公布日期	1958.05.14
申请号	GB19560036953	申请日期	1956.12.03
申请人	TELEFONAKTIEBOLAGET L M ERICSSON	发明人
分类号	H04M1/60;H04M9/00	主分类号	H04M1/60
代理机构		代理人
主权项
地址

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