LandOfFree - US Patents - Listing for Boring or penetrating the earth,Bit or bit element,Casing shoe type

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Bollands Martin A.

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Caledus Limited

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Enterprise Oil plc

Corporate Assignee

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Fletcher Frederick

Inventor

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Griffin Wellpoint Corporation

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Ishizeki Masakazu

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Koshiba Tomohiro

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Laing Robert A.

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Lundeen & Lundeen PLLC

Law Firm

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McClain Eric E.

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Strong Philip

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Thukral Prem S.

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U.S. Saws, Inc.

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Wardley Michael

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Werblin David A.

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Woolmington Timothy P.

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