Perfectionnement aux microphones,申请号FRD1136866-传众专利搜索

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发明名称	Perfectionnement aux microphones
摘要
申请公布号	FR1136866(A)	申请公布日期	1957.05.21
申请号	FRD1136866	申请日期	1955.10.01
申请人	MELODIUM S. A.	发明人
分类号	H04R1/22	主分类号	H04R1/22
代理机构		代理人
主权项
地址

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