Perfectionnement acoustique adaptable aux pianos,申请号FRD908019-传众专利搜索

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发明名称	Perfectionnement acoustique adaptable aux pianos
摘要
申请公布号	FR908019(A)	申请公布日期	1946.03.28
申请号	FRD908019	申请日期	1944.06.01
申请人		发明人	LAVERSANNE JEAN
分类号	G10C3/02	主分类号	G10C3/02
代理机构		代理人
主权项
地址

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