Improvements in or relating to wave signalling systems,申请号GB19300009565-传众专利搜索

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发明名称	Improvements in or relating to wave signalling systems
摘要
申请公布号	GB353490(A)	申请公布日期	1931.07.27
申请号	GB19300009565	申请日期	1930.03.25
申请人	JAMES ROBINSON	发明人
分类号	H04B1/68	主分类号	H04B1/68
代理机构		代理人
主权项
地址

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