Perfectionnements dans les dispositifs producteurs de son,申请号FRD731273-传众专利搜索

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发明名称	Perfectionnements dans les dispositifs producteurs de son
摘要
申请公布号	FR731273(A)	申请公布日期	1932.08.31
申请号	FRD731273	申请日期	1932.02.11
申请人		发明人	NORTHEY JOHN PELL;NORTHEY RODNEY VERNON
分类号	G10K7/06	主分类号	G10K7/06
代理机构		代理人
主权项
地址

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