Device for indicating stages of fluid depth of water in wells,申请号US19540430766-传众专利搜索

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发明名称	Device for indicating stages of fluid depth of water in wells
摘要
申请公布号	US2791907(A)	申请公布日期	1957.05.14
申请号	US19540430766	申请日期	1954.05.19
申请人	GRINER	发明人	GRINER GLADYS M.;CRANE CARL J.
分类号	E21B47/04;G01F23/00	主分类号	E21B47/04
代理机构		代理人
主权项
地址

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