Well surveying device,申请号US19400343183-传众专利搜索

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发明名称	Well surveying device
摘要
申请公布号	US2318612(A)	申请公布日期	1943.05.11
申请号	US19400343183	申请日期	1940.06.29
申请人	SPERRY-SUN WELL SURVEYING COMPANY	发明人	KOTHNY GOTTDANK L.
分类号	E21B47/00	主分类号	E21B47/00
代理机构		代理人
主权项
地址

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