ELECTRIC MINE SHAFT SIGNAL SYSTEMS,申请号CAD474337-传众专利搜索

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发明名称	ELECTRIC MINE SHAFT SIGNAL SYSTEMS
摘要
申请公布号	CA474337(A)	申请公布日期	1951.06.12
申请号	CAD474337	申请日期
申请人	RICHMOND L. RUTHERFORD	发明人	RICHMOND L. RUTHERFORD
分类号		主分类号
代理机构		代理人
主权项
地址

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