Circuit for controlling transmission in signaling systems,申请号US19320629536-传众专利搜索

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发明名称	Circuit for controlling transmission in signaling systems
摘要
申请公布号	US1990414(A)	申请公布日期	1935.02.05
申请号	US19320629536	申请日期	1932.08.19
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	NEWBY NEAL D.;MOODY DWIGHT L.
分类号	H04B3/20	主分类号	H04B3/20
代理机构		代理人
主权项
地址

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