Underwater wellhead apparatus,申请号US19670647880-传众专利搜索

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发明名称	Underwater wellhead apparatus
摘要
申请公布号	US3419071(A)	申请公布日期	1968.12.31
申请号	US19670647880	申请日期	1967.06.21
申请人	CAMERON IRON WORKS, INC.	发明人	JR. LEONARD E. WILLIAMS,;GRULLER DAVID L.
分类号	E21B43/013	主分类号	E21B43/013
代理机构		代理人
主权项
地址

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