Perfectionnements aux arrangements de circuits comprenant des tubes à vide,申请号FRD722651-传众专利搜索

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发明名称	Perfectionnements aux arrangements de circuits comprenant des tubes à vide
摘要
申请公布号	FR722651(A)	申请公布日期	1932.03.23
申请号	FRD722651	申请日期	1931.08.31
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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