SAFETY DRILL PIPE FLOAT,申请号CAD911423-传众专利搜索

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发明名称	SAFETY DRILL PIPE FLOAT
摘要
申请公布号	CA911423(A)	申请公布日期	1972.10.03
申请号	CAD911423	申请日期
申请人	BYRON JACKSON	发明人	WAYNE M. SULLIVAN;JOHN W. TURNER, JR.
分类号	E21B21/10;E21B35/00;F16K17/40;(IPC1-7):E21B35/00	主分类号	E21B21/10
代理机构		代理人
主权项
地址

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