TELEGRAPH MONITORING SYSTEM,申请号CAD299612-传众专利搜索

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发明名称	TELEGRAPH MONITORING SYSTEM
摘要
申请公布号	CA299612(A)	申请公布日期	1930.04.22
申请号	CAD299612	申请日期
申请人	THE WESTERN ELECTRIC COMPANY	发明人	DAVID ERNEST BRANSON
分类号		主分类号
代理机构		代理人
主权项
地址

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