Perfectionnements aux haut-parleurs électrodynamiques,申请号FRD711963-传众专利搜索

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发明名称	Perfectionnements aux haut-parleurs électrodynamiques
摘要
申请公布号	FR711963(A)	申请公布日期	1931.09.22
申请号	FRD711963	申请日期	1930.06.02
申请人		发明人	POIX GAUTHIER DE
分类号	H04R9/04	主分类号	H04R9/04
代理机构		代理人
主权项
地址

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