Improved sound records,申请号GB19300015881-传众专利搜索

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发明名称	Improved sound records
摘要
申请公布号	GB355669(A)	申请公布日期	1931.08.24
申请号	GB19300015881	申请日期	1930.05.23
申请人	JACQUES EMILE JULES LANGUEPIN	发明人
分类号	G11B5/64	主分类号	G11B5/64
代理机构		代理人
主权项
地址

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