Audio frequency volume control means,申请号US19360061780-传众专利搜索

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发明名称	Audio frequency volume control means
摘要
申请公布号	US2121091(A)	申请公布日期	1938.06.21
申请号	US19360061780	申请日期	1936.01.31
申请人	RADIO CORPORATION OF AMERICA	发明人	MAGINNIS WILLIAM P.
分类号	H03G9/00	主分类号	H03G9/00
代理机构		代理人
主权项
地址

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