Device for maintaining a fixed bias,申请号US19420465595-传众专利搜索

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发明名称	Device for maintaining a fixed bias
摘要
申请公布号	US2375877(A)	申请公布日期	1945.05.15
申请号	US19420465595	申请日期	1942.11.14
申请人	DE FOREST'S TRAINING, INC.	发明人	THOMPSON ORVILLE I.
分类号	H04B1/16	主分类号	H04B1/16
代理机构		代理人
主权项
地址

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