System for detecting and amplifying modulated electrical variations,申请号US19330700253-传众专利搜索

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发明名称	System for detecting and amplifying modulated electrical variations
摘要
申请公布号	US2058432(A)	申请公布日期	1936.10.27
申请号	US19330700253	申请日期	1933.11.29
申请人	RADIO CORPORATION OF AMERICA	发明人	FERRIS WARREN R.
分类号	H03D1/06	主分类号	H03D1/06
代理机构		代理人
主权项
地址

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