COLLAR ASSEMBLY FOR DOWNHOLE TELEMETRY,申请号GB19840015409-传众专利搜索

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发明名称	COLLAR ASSEMBLY FOR DOWNHOLE TELEMETRY
摘要
申请公布号	GB8415409(D0)	申请公布日期	1984.07.18
申请号	GB19840015409	申请日期	1984.06.16
申请人	NICHOLSON, H L	发明人
分类号	E21B47/12;(IPC1-7):E21B47/12	主分类号	E21B47/12
代理机构		代理人
主权项
地址

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