Perfectionnements aux lampes thermioniques répétitrices,申请号FRD837808-传众专利搜索

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发明名称	Perfectionnements aux lampes thermioniques répétitrices
摘要
申请公布号	FR837808(A)	申请公布日期	1939.02.21
申请号	FRD837808	申请日期	1938.05.11
申请人	ELECTRIC & MUSICAL INDUSTRIES LIMITED	发明人
分类号	H03F3/52	主分类号	H03F3/52
代理机构		代理人
主权项
地址

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