Perfectionnements aux transmetteurs électro-acoustiques et aux appareils analogues,申请号FRD858268-传众专利搜索

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发明名称	Perfectionnements aux transmetteurs électro-acoustiques et aux appareils analogues
摘要
申请公布号	FR858268(A)	申请公布日期	1940.11.21
申请号	FRD858268	申请日期	1939.05.01
申请人	HENRY HUGUES & SON, LIMITED	发明人	SPROULE DONALD ORR;HUGHES ARTHUR JOSEPH
分类号	G01S1/72;H04R9/02	主分类号	G01S1/72
代理机构		代理人
主权项
地址

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