Procédé de protection contre les bruits,申请号FRD722274-传众专利搜索

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发明名称	Procédé de protection contre les bruits
摘要
申请公布号	FR722274(A)	申请公布日期	1932.03.15
申请号	FRD722274	申请日期	1930.10.21
申请人		发明人	COANDA HENRI
分类号	H04R1/40	主分类号	H04R1/40
代理机构		代理人
主权项
地址

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