Cable fault detection and telephone system,申请号US19310571210-传众专利搜索

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发明名称	Cable fault detection and telephone system
摘要
申请公布号	US1849994(A)	申请公布日期	1932.03.15
申请号	US19310571210	申请日期	1931.10.26
申请人	THE WESTERN UNION TELEGRAPH COMPANY	发明人	RUDD MAURICE A.;MAMPLE ADOLPH Z.
分类号	H04M3/28	主分类号	H04M3/28
代理机构		代理人
主权项
地址

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