Perfectionnements aux systèmes téléphoniques automatiques,申请号FRD40822-传众专利搜索

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发明名称	Perfectionnements aux systèmes téléphoniques automatiques
摘要
申请公布号	FR40822(E)	申请公布日期	1932.09.07
申请号	FRD40822	申请日期	1931.09.28
申请人	COMPAGNIE DES TELEPHONES THOMSON-HOUSTON	发明人
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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