Electrical amplifier circuits,申请号US19280316207-传众专利搜索

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发明名称	Electrical amplifier circuits
摘要
申请公布号	US1912891(A)	申请公布日期	1933.06.06
申请号	US19280316207	申请日期	1928.10.31
申请人	RADIO CORPORATION OF AMERICA	发明人	DRAKE FREDERICK H.
分类号	H03F1/16	主分类号	H03F1/16
代理机构		代理人
主权项
地址

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