Tube électronique à émission secondaire,申请号FRD812252-传众专利搜索

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发明名称	Tube électronique à émission secondaire
摘要
申请公布号	FR812252(A)	申请公布日期	1937.05.04
申请号	FRD812252	申请日期	1936.10.15
申请人	RADIOAKTIENGESELLSCHAFT D. S. LOEWE	发明人
分类号	H01J29/00	主分类号	H01J29/00
代理机构		代理人
主权项
地址

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