Well drilling tool,申请号US19350014118-传众专利搜索

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发明名称	Well drilling tool
摘要
申请公布号	US2044303(A)	申请公布日期	1936.06.16
申请号	US19350014118	申请日期	1935.04.01
申请人	GLOBE OIL TOOLS COMPANY	发明人	HOWARD JOHN H.
分类号	E21B10/08	主分类号	E21B10/08
代理机构		代理人
主权项
地址

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