Disque de machine parlante,申请号FRD713937-传众专利搜索

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发明名称	Disque de machine parlante
摘要
申请公布号	FR713937(A)	申请公布日期	1931.11.04
申请号	FRD713937	申请日期	1931.03.27
申请人	POLYPHONWERKE AKTIENGESELLSCHAFT	发明人
分类号	G11B3/70	主分类号	G11B3/70
代理机构		代理人
主权项
地址

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