Perfectionnement aux reproducteurs électro-acoustiques,申请号FRD909135-传众专利搜索

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发明名称	Perfectionnement aux reproducteurs électro-acoustiques
摘要
申请公布号	FR909135(A)	申请公布日期	1946.04.30
申请号	FRD909135	申请日期	1944.09.29
申请人	SADIR-CARPENTIER	发明人
分类号	H04R1/02	主分类号	H04R1/02
代理机构		代理人
主权项
地址

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