Rotary, straight-pull jar assembly,申请号US19370150289-传众专利搜索

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发明名称	Rotary, straight-pull jar assembly
摘要
申请公布号	US2121267(A)	申请公布日期	1938.06.21
申请号	US19370150289	申请日期	1937.06.25
申请人	SHAFFER DONALD U	发明人	SHAFFER DONALD U.
分类号	E21B31/107	主分类号	E21B31/107
代理机构		代理人
主权项
地址

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