Automatic volume control for recorder amplifiers,申请号US19390291080-传众专利搜索

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发明名称	Automatic volume control for recorder amplifiers
摘要
申请公布号	US2318624(A)	申请公布日期	1943.05.11
申请号	US19390291080	申请日期	1939.08.19
申请人	PETTY	发明人	PETTY OLIVE S.;JR. JOSEPHUS O. PARR,
分类号	H03G3/22	主分类号	H03G3/22
代理机构		代理人
主权项
地址

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