An improved educational appliance for teaching and studying music,申请号GB19300017613-传众专利搜索

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发明名称	An improved educational appliance for teaching and studying music
摘要
申请公布号	GB356751(A)	申请公布日期	1931.09.07
申请号	GB19300017613	申请日期	1930.06.06
申请人	THEODORE ALFRED APPIA	发明人
分类号	G09B15/02	主分类号	G09B15/02
代理机构		代理人
主权项
地址

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