Perfectionnements aux dispositifs électriques pour l'enregistrement des signaux, tels que ceux utilisés dans les systèmes téléphoniques,申请号FRD731076-传众专利搜索

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发明名称	Perfectionnements aux dispositifs électriques pour l'enregistrement des signaux, tels que ceux utilisés dans les systèmes téléphoniques
摘要
申请公布号	FR731076(A)	申请公布日期	1932.08.29
申请号	FRD731076	申请日期	1932.02.05
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H03G3/20	主分类号	H03G3/20
代理机构		代理人
主权项
地址

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