Finger guide for musical instruments,申请号US19570680811-传众专利搜索

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发明名称	Finger guide for musical instruments
摘要
申请公布号	US2918838(A)	申请公布日期	1959.12.29
申请号	US19570680811	申请日期	1957.08.28
申请人	WORREL JOHN W	发明人	WORREL JOHN W.
分类号	G09B15/06	主分类号	G09B15/06
代理机构		代理人
主权项
地址

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