Systèmes d'amplificateurs,申请号FRD847653-传众专利搜索

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发明名称	Systèmes d'amplificateurs
摘要
申请公布号	FR847653(A)	申请公布日期	1939.10.13
申请号	FRD847653	申请日期	1938.12.16
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H03F1/36;H03F3/28;H03F3/32	主分类号	H03F1/36
代理机构		代理人
主权项
地址

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