Improvements in or relating to aerial systems having a directional effect,申请号GB19310013453-传众专利搜索

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发明名称	Improvements in or relating to aerial systems having a directional effect
摘要
申请公布号	GB387664(A)	申请公布日期	1933.02.09
申请号	GB19310013453	申请日期	1931.05.06
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01Q21/12	主分类号	H01Q21/12
代理机构		代理人
主权项
地址

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