Improvements in or relating to high frequency signalling systems,申请号GB19300035885-传众专利搜索

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发明名称	Improvements in or relating to high frequency signalling systems
摘要
申请公布号	GB356584(A)	申请公布日期	1931.09.10
申请号	GB19300035885	申请日期	1930.11.28
申请人	MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED	发明人
分类号	H04L27/20;H04L27/227	主分类号	H04L27/20
代理机构		代理人
主权项
地址

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