Traitement des poudres magnétiques,申请号FRD850772-传众专利搜索

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法人/股东/高管

发明名称	Traitement des poudres magnétiques
摘要
申请公布号	FR850772(A)	申请公布日期	1939.12.26
申请号	FRD850772	申请日期	1939.02.23
申请人	LIGNES TELEGRAPHIQUES ET TELEPHONIQUES	发明人
分类号	H01F1/14	主分类号	H01F1/14
代理机构		代理人
主权项
地址

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