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法人/股东/高管

发明名称	Piano
摘要
申请公布号	US1770983(A)	申请公布日期	1930.07.22
申请号	US19280275036	申请日期	1928.05.04
申请人	JONES EDGAR B	发明人	JONES EDGAR B.
分类号	G10C1/04	主分类号	G10C1/04
代理机构		代理人
主权项
地址

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