Improvements in directional antenna-systems,申请号GB19390000999-传众专利搜索

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发明名称	Improvements in directional antenna-systems
摘要
申请公布号	GB523641(A)	申请公布日期	1940.07.18
申请号	GB19390000999	申请日期	1939.01.11
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01Q21/06	主分类号	H01Q21/06
代理机构		代理人
主权项
地址

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