Piano,申请号US19290377189-传众专利搜索

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发明名称	Piano
摘要
申请公布号	US1821977(A)	申请公布日期	1931.09.08
申请号	US19290377189	申请日期	1929.07.10
申请人	GULBRANSEN COMPANY	发明人	LOAR LLOYD
分类号	G10C3/26	主分类号	G10C3/26
代理机构		代理人
主权项
地址

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