Drill pipe and propeller shaft,申请号US19280308239-传众专利搜索

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法人/股东/高管

发明名称	Drill pipe and propeller shaft
摘要
申请公布号	US1839844(A)	申请公布日期	1932.01.05
申请号	US19280308239	申请日期	1928.09.25
申请人	GRANGER PAUL H	发明人	GRANGER PAUL H.
分类号	E21B7/00;E21B17/04	主分类号	E21B7/00
代理机构		代理人
主权项
地址

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