Apparatus for heating oil wells,申请号US19500194270-传众专利搜索

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法人/股东/高管

发明名称	Apparatus for heating oil wells
摘要
申请公布号	US2647196(A)	申请公布日期	1953.07.28
申请号	US19500194270	申请日期	1950.11.06
申请人	UNION OIL COMPANY	发明人	CARPENTER CLAYTON A.;CROG RICHARD S.
分类号	E21B36/04	主分类号	E21B36/04
代理机构		代理人
主权项
地址

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