Multiplex-simplex extended channel system,申请号US19370155419-传众专利搜索

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发明名称	Multiplex-simplex extended channel system
摘要
申请公布号	US2199284(A)	申请公布日期	1940.04.30
申请号	US19370155419	申请日期	1937.07.24
申请人	THE WESTERN UNION TELEGRAPH COMPANY	发明人	DUERR KARL B.
分类号	H04L5/24	主分类号	H04L5/24
代理机构		代理人
主权项
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