Key pad for wind instruments,申请号US19480018653-传众专利搜索

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发明名称	Key pad for wind instruments
摘要
申请公布号	US2540760(A)	申请公布日期	1951.02.06
申请号	US19480018653	申请日期	1948.04.02
申请人	C. G. CONN, LTD.	发明人	SCHOEMANN FRED M.
分类号	G10D9/04	主分类号	G10D9/04
代理机构		代理人
主权项
地址

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