Perfectionnements aux récepteurs radiophoniques et appareils similaires comportant un haut-parleur,申请号FRD821715-传众专利搜索

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发明名称	Perfectionnements aux récepteurs radiophoniques et appareils similaires comportant un haut-parleur
摘要
申请公布号	FR821715(A)	申请公布日期	1937.12.11
申请号	FRD821715	申请日期	1937.05.11
申请人		发明人	BRIGGS GEORGE
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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