Perfectionnement aux relais amplificateurs convenant aux liaisons bilatérales et plus particulièrement aux communications téléphoniques,申请号FRD808759-传众专利搜索

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发明名称	Perfectionnement aux relais amplificateurs convenant aux liaisons bilatérales et plus particulièrement aux communications téléphoniques
摘要
申请公布号	FR808759(A)	申请公布日期	1937.02.15
申请号	FRD808759	申请日期	1935.10.31
申请人	SOCIETE INDUSTRIELLE DES TELEPHONES	发明人
分类号	H04B3/20	主分类号	H04B3/20
代理机构		代理人
主权项
地址

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