US Patent 7140445 Method and apparatus for drilling with casing
Is a
Date Filed
March 5, 2004
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Date of Patent
November 28, 2006
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Patent Application Number
10794797
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Patent Inventor Names
Jimmy L. Hollingsworth
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Bernd Reinholdt
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Bernd-Georg Pietras
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David M. Haugen
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David Shahin
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Gary Thompson
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Jeff Habetz
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Patent Jurisdiction
Patent Number
Patent Primary Examiner
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