Improvements in and relating to thermionic amplifying systems,申请号GB19290010340-传众专利搜索

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发明名称	Improvements in and relating to thermionic amplifying systems
摘要
申请公布号	GB309044(A)	申请公布日期	1930.05.22
申请号	GB19290010340	申请日期	1929.04.03
申请人	THE BRITISH THOMSON-HOUSTON COMPANY LIMITED	发明人
分类号	H03F3/36	主分类号	H03F3/36
代理机构		代理人
主权项
地址

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