Improvements in or relating to directional radio beam systems,申请号GB19320016571-传众专利搜索

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发明名称	Improvements in or relating to directional radio beam systems
摘要
申请公布号	GB402835(A)	申请公布日期	1933.12.11
申请号	GB19320016571	申请日期	1932.06.11
申请人	FEDERAL TELEGRAPH COMPANY	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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