Preamplifier for photoelectric musical instruments,申请号US19510240416-传众专利搜索

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发明名称	Preamplifier for photoelectric musical instruments
摘要
申请公布号	US2801342(A)	申请公布日期	1957.07.30
申请号	US19510240416	申请日期	1951.08.04
申请人	THE BALDWIN PIANO COMPANY	发明人	JONES EDWARD M.
分类号	G10H3/06	主分类号	G10H3/06
代理机构		代理人
主权项
地址

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