Disque de phonographe à couches intermédiaires et son procédé de fabrication,申请号FRD707238-传众专利搜索

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发明名称	Disque de phonographe à couches intermédiaires et son procédé de fabrication
摘要
申请公布号	FR707238(A)	申请公布日期	1931.07.06
申请号	FRD707238	申请日期	1930.12.08
申请人	WELLIT-GESELLSCHAFT PLESS & CO	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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