PITLESS WELL ADAPTER,申请号CAD900350-传众专利搜索

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发明名称	PITLESS WELL ADAPTER
摘要
申请公布号	CA900350(A)	申请公布日期	1972.05.16
申请号	CAD900350	申请日期
申请人	MARTINSON MANUFACTURING CO.	发明人	DEAN C. KRAMER
分类号	E21B33/00;E21B33/03;(IPC1-7):E21B33/00	主分类号	E21B33/00
代理机构		代理人
主权项
地址

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