Fabrication des poudres magnétiques,申请号FRD840157-传众专利搜索

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发明名称	Fabrication des poudres magnétiques
摘要
申请公布号	FR840157(A)	申请公布日期	1939.04.20
申请号	FRD840157	申请日期	1938.07.01
申请人	LIGNES TELEGRAPHIQUES ET TELEPHONIQUES	发明人
分类号	B22F1/00	主分类号	B22F1/00
代理机构		代理人
主权项
地址

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