TELEGRAPH EXCHANGE SYSTEM,申请号CAD389511-传众专利搜索

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发明名称	TELEGRAPH EXCHANGE SYSTEM
摘要
申请公布号	CA389511(A)	申请公布日期	1940.06.18
申请号	CAD389511	申请日期
申请人	THE WESTERN UNION TELEGRAPH COMPANY	发明人	ROY BARTON WHITE;WILLIAM BONAVITA BLANTON
分类号		主分类号
代理机构		代理人
主权项
地址

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