Improvements in or relating to well tools, such as elevators,申请号GB19390032598-传众专利搜索

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发明名称	Improvements in or relating to well tools, such as elevators
摘要
申请公布号	GB534052(A)	申请公布日期	1941.02.26
申请号	GB19390032598	申请日期	1939.12.20
申请人	BYRON JACKSON CO.	发明人
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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