Method and apparatus for controllably drilling off-vertical holes,申请号US19640362100-传众专利搜索

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法人/股东/高管

发明名称	Method and apparatus for controllably drilling off-vertical holes
摘要
申请公布号	US3285350(A)	申请公布日期	1966.11.15
申请号	US19640362100	申请日期	1964.04.23
申请人	KELLER HENDERSON JOHN	发明人	HENDERSON JOHN KELLER
分类号	E21B7/06;E21B7/08	主分类号	E21B7/06
代理机构		代理人
主权项
地址

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