Improvements in and relating to thermionic valve amplifiers,申请号GB19470009878-传众专利搜索

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发明名称	Improvements in and relating to thermionic valve amplifiers
摘要
申请公布号	GB646647(A)	申请公布日期	1950.11.29
申请号	GB19470009878	申请日期	1947.04.14
申请人	THE MINISTER OF SUPPLY	发明人	RUSSELL GRAHAM
分类号	H03K5/02	主分类号	H03K5/02
代理机构		代理人
主权项
地址

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