Improvements in vibrating sound-producing and recording apparatus,申请号GB19290004994-传众专利搜索

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发明名称	Improvements in vibrating sound-producing and recording apparatus
摘要
申请公布号	GB329300(A)	申请公布日期	1930.05.14
申请号	GB19290004994	申请日期	1929.02.14
申请人	JOHN WILLIAM MILLER;"K.N." ELECTRICAL PRODUCTS LIMITED	发明人
分类号	H04R11/00	主分类号	H04R11/00
代理机构		代理人
主权项
地址

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