Polish rod hanger,申请号US19500190525-传众专利搜索

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法人/股东/高管

发明名称	Polish rod hanger
摘要
申请公布号	US2599869(A)	申请公布日期	1952.06.10
申请号	US19500190525	申请日期	1950.10.17
申请人	J. M. HUBER CORPORATION	发明人	SHELTON CALVIN W.
分类号	E21B1/02	主分类号	E21B1/02
代理机构		代理人
主权项
地址

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