Perfectionnements aux lentilles électroniques,申请号FRD838149-传众专利搜索

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发明名称	Perfectionnements aux lentilles électroniques
摘要
申请公布号	FR838149(A)	申请公布日期	1939.02.28
申请号	FRD838149	申请日期	1938.05.19
申请人	ELECTRIC & MUSICAL INDUSTRIES LIMITED	发明人
分类号	H01J29/58	主分类号	H01J29/58
代理机构		代理人
主权项
地址

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