Sucker-rod elevator,申请号US19280261917-传众专利搜索

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发明名称	Sucker-rod elevator
摘要
申请公布号	US1755134(A)	申请公布日期	1930.04.15
申请号	US19280261917	申请日期	1928.03.15
申请人	SAWYER GREGORY E	发明人	SAWYER GREGORY E.
分类号	E21B19/06	主分类号	E21B19/06
代理机构		代理人
主权项
地址

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