Superimposed telegraph circuits,申请号US19280258948-传众专利搜索

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发明名称	Superimposed telegraph circuits
摘要
申请公布号	US1758900(A)	申请公布日期	1930.05.13
申请号	US19280258948	申请日期	1928.03.03
申请人	THE WESTERN UNION TELEGRAPH COMPANY	发明人	MORGENSTERN RONALD V.
分类号	H04L5/20	主分类号	H04L5/20
代理机构		代理人
主权项
地址

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