Perfectionnement aux appareils téléphoniques,申请号FRD936557-传众专利搜索

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发明名称	Perfectionnement aux appareils téléphoniques
摘要
申请公布号	FR936557(A)	申请公布日期	1948.07.23
申请号	FRD936557	申请日期	1946.11.21
申请人	LA PRECISION ELECTRIQUE	发明人
分类号	H04M9/00	主分类号	H04M9/00
代理机构		代理人
主权项
地址

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