Perfectionnements aux dispositifs destinés à la traduction des sons,申请号FRD730676-传众专利搜索

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发明名称	Perfectionnements aux dispositifs destinés à la traduction des sons
摘要
申请公布号	FR730676(A)	申请公布日期	1932.08.19
申请号	FRD730676	申请日期	1932.01.29
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	发明人
分类号	H04R1/22;H04R9/06;H04R9/10	主分类号	H04R1/22
代理机构		代理人
主权项
地址

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