Telegraph repeater circuits,申请号US19340733902-传众专利搜索

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发明名称	Telegraph repeater circuits
摘要
申请公布号	US2055575(A)	申请公布日期	1936.09.29
申请号	US19340733902	申请日期	1934.07.05
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	HERMAN JOSEPH
分类号	H04L5/18;H04L25/04;H04L25/20;H04L25/42	主分类号	H04L5/18
代理机构		代理人
主权项
地址

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