Perfectionnements aux transducteurs,申请号FRD1181248-传众专利搜索

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发明名称	Perfectionnements aux transducteurs
摘要
申请公布号	FR1181248(A)	申请公布日期	1959.06.12
申请号	FRD1181248	申请日期	1957.08.16
申请人	COSMOCORD LIMITED	发明人
分类号	H04R23/00	主分类号	H04R23/00
代理机构		代理人
主权项
地址

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