Well hoisting device,申请号US19410396735-传众专利搜索

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发明名称	Well hoisting device
摘要
申请公布号	US2324096(A)	申请公布日期	1943.07.13
申请号	US19410396735	申请日期	1941.06.05
申请人	LILLY RUSSELL M	发明人	LILLY RUSSELL M.
分类号	E21B19/14	主分类号	E21B19/14
代理机构		代理人
主权项
地址

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