Dispositif pour modifier le temps de développement et d'extinction des des ondres sonores,申请号FRD712032-传众专利搜索

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发明名称	Dispositif pour modifier le temps de développement et d'extinction des des ondres sonores
摘要
申请公布号	FR712032(A)	申请公布日期	1931.09.23
申请号	FRD712032	申请日期	1931.02.24
申请人	KLANGFILM	发明人
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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