Perfectionnements aux postes téléphoniques de cabine,申请号FRD54971-传众专利搜索

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发明名称	Perfectionnements aux postes téléphoniques de cabine
摘要
申请公布号	FR54971(E)	申请公布日期	1951.06.05
申请号	FRD54971	申请日期	1946.07.20
申请人		发明人	LENAIN HENRI
分类号	H04M17/02	主分类号	H04M17/02
代理机构		代理人
主权项
地址

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