Inverse neutral telegraph repeater hub circuit,申请号US19410414580-传众专利搜索

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发明名称	Inverse neutral telegraph repeater hub circuit
摘要
申请公布号	US2347813(A)	申请公布日期	1944.05.02
申请号	US19410414580	申请日期	1941.10.11
申请人	BLANCHE FRY CUMMINGS;BELL TELEPHONE LABORATORIES, INCORPORATED	发明人
分类号	H04L12/18;H04L25/04	主分类号	H04L12/18
代理机构		代理人
主权项
地址

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