Circuits d'alimentation pour lampes thermoioniques,申请号FRD839202-传众专利搜索

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法人/股东/高管

发明名称	Circuits d'alimentation pour lampes thermoioniques
摘要
申请公布号	FR839202(A)	申请公布日期	1939.03.29
申请号	FRD839202	申请日期	1938.06.11
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H03F1/54	主分类号	H03F1/54
代理机构		代理人
主权项
地址

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