Earth-current corrector for cable signals,申请号US19280247600-传众专利搜索

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发明名称	Earth-current corrector for cable signals
摘要
申请公布号	US1747084(A)	申请公布日期	1930.02.11
申请号	US19280247600	申请日期	1928.01.18
申请人	THE WESTERN UNION TELEGRAPH COMPANY	发明人	RIDGE GUY H.
分类号	H04L25/06	主分类号	H04L25/06
代理机构		代理人
主权项
地址

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