Perfectionnements aux récepteurs et aux reproducteurs de sons,申请号FRD673663-传众专利搜索

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发明名称	Perfectionnements aux récepteurs et aux reproducteurs de sons
摘要
申请公布号	FR673663(A)	申请公布日期	1930.01.17
申请号	FRD673663	申请日期	1928.08.14
申请人		发明人	GOULIER LOUIS
分类号	H04R7/16	主分类号	H04R7/16
代理机构		代理人
主权项
地址

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