Improvements in and relating to thermionic valve apparatus,申请号GB19380023648-传众专利搜索

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发明名称	Improvements in and relating to thermionic valve apparatus
摘要
申请公布号	GB520075(A)	申请公布日期	1940.04.15
申请号	GB19380023648	申请日期	1938.08.10
申请人	RICHARD LEWIS FORTESCUE	发明人
分类号	H03C1/16	主分类号	H03C1/16
代理机构		代理人
主权项
地址

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