Volume control for radio amplifier circuits,申请号US19270206068-传众专利搜索

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发明名称	Volume control for radio amplifier circuits
摘要
申请公布号	US1839109(A)	申请公布日期	1931.12.29
申请号	US19270206068	申请日期	1927.07.15
申请人	GENERAL MOTORS RADIO CORPORATION	发明人	MARVEL ORIN E.
分类号	H03G3/02	主分类号	H03G3/02
代理机构		代理人
主权项
地址

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