INTERFERENCE WARNING DEVICE,申请号EP19850630053-传众专利搜索

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发明名称	INTERFERENCE WARNING DEVICE
摘要
申请公布号	EP0162797(B1)	申请公布日期	1988.03.09
申请号	EP19850630053	申请日期	1985.04.11
申请人	HUGHES TOOL COMPANY	发明人	SMITH, ROGER, JR.;PRIEST, JOSEPH ROBERT;LANGOWSKI, FAUSTYN CORNELL;HEBARD, HARRY DALTON
分类号	E21B19/00;E21B19/20;(IPC1-7):E21B19/00	主分类号	E21B19/00
代理机构		代理人
主权项
地址

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