Key and key frame for grand pianos,申请号US19340729414-传众专利搜索

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发明名称	Key and key frame for grand pianos
摘要
申请公布号	US2040304(A)	申请公布日期	1936.05.12
申请号	US19340729414	申请日期	1934.06.07
申请人	GEORGE FRANK L	发明人	GEORGE FRANK L.
分类号	G10C3/12	主分类号	G10C3/12
代理机构		代理人
主权项
地址

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