Octave vent for musical wind instruments,申请号US19400329940-传众专利搜索

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发明名称	Octave vent for musical wind instruments
摘要
申请公布号	US2226536(A)	申请公布日期	1940.12.31
申请号	US19400329940	申请日期	1940.04.16
申请人	H. SELMER & CIE	发明人	SEIMER MAURICE
分类号	G10D9/04	主分类号	G10D9/04
代理机构		代理人
主权项
地址

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