Improvements in electric carrier signalling systems,申请号GB19340009257-传众专利搜索

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发明名称	Improvements in electric carrier signalling systems
摘要
申请公布号	GB431010(A)	申请公布日期	1935.06.28
申请号	GB19340009257	申请日期	1934.03.24
申请人	ARTHUR CARLYLE TIMMIS	发明人
分类号	H04J1/00	主分类号	H04J1/00
代理机构		代理人
主权项
地址

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