Improvements in or relating to carrier wave signalling systems,申请号GB19300009994-传众专利搜索

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发明名称	Improvements in or relating to carrier wave signalling systems
摘要
申请公布号	GB351991(A)	申请公布日期	1931.06.29
申请号	GB19300009994	申请日期	1930.03.28
申请人	GEORGE PRIECHENFRIED	发明人
分类号	H04L27/20	主分类号	H04L27/20
代理机构		代理人
主权项
地址

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