Well-drilling pump unit,申请号US19410402395-传众专利搜索

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发明名称	Well-drilling pump unit
摘要
申请公布号	US2302692(A)	申请公布日期	1942.11.24
申请号	US19410402395	申请日期	1941.07.14
申请人	HEINER LEONARD K	发明人	HEINER LEONARD K.
分类号	E21B4/06;E21B33/138	主分类号	E21B4/06
代理机构		代理人
主权项
地址

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