Improvements in devices for practising harmonica technique,申请号GB19300007784-传众专利搜索

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发明名称	Improvements in devices for practising harmonica technique
摘要
申请公布号	GB345798(A)	申请公布日期	1931.04.02
申请号	GB19300007784	申请日期	1930.03.10
申请人	WALTER CLARENCE PATERSON	发明人
分类号	G10D7/12	主分类号	G10D7/12
代理机构		代理人
主权项
地址

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