Pneumatically operated pianoforte,申请号US19300440091-传众专利搜索

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发明名称	Pneumatically operated pianoforte
摘要
申请公布号	US1827563(A)	申请公布日期	1931.10.13
申请号	US19300440091	申请日期	1930.03.29
申请人	JOHN BROADWOOD & SONS LIMITED	发明人	COLLEN ROBERT HENRY
分类号	G10F1/02	主分类号	G10F1/02
代理机构		代理人
主权项
地址

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