Perfectionnements aux lecteurs de son,申请号FRD952064-传众专利搜索

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发明名称	Perfectionnements aux lecteurs de son
摘要
申请公布号	FR952064(A)	申请公布日期	1949.11.09
申请号	FRD952064	申请日期	1947.08.14
申请人		发明人	LIGNIER YVAN
分类号	G11B7/003;G11B7/24	主分类号	G11B7/003
代理机构		代理人
主权项
地址

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