Telegraph exchange system,申请号US19400350402-传众专利搜索

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发明名称	Telegraph exchange system
摘要
申请公布号	US2484838(A)	申请公布日期	1949.10.18
申请号	US19400350402	申请日期	1940.08.03
申请人	THE WESTERN UNION TELEGRAPH COMPANY	发明人	LIGHT GEORGE G.;BLANTON WILLIAM B.
分类号	H04L12/62	主分类号	H04L12/62
代理机构		代理人
主权项
地址

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