Improvements in radio signalling systems,申请号GB19380013838-传众专利搜索

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发明名称	Improvements in radio signalling systems
摘要
申请公布号	GB514778(A)	申请公布日期	1939.11.17
申请号	GB19380013838	申请日期	1938.05.09
申请人	THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED	发明人
分类号	H01P1/212;H01Q5/00	主分类号	H01P1/212
代理机构		代理人
主权项
地址

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