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Patent Assignment Details

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Reel/Frame:	020234/0047			Pages:	7
		Recorded:	12/12/2007
Attorney Dkt #:	28490-28300
Conveyance:	RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).

Total properties: 14

Patent #:	4763736	Issue Dt:	08/16/1988	Application #:	07071157	Filing Dt:	07/08/1987
Title:	ASYMMETRICAL ROTARY CONE BIT

Patent #:	5944125	Issue Dt:	08/31/1999	Application #:	08878622	Filing Dt:	06/19/1997
Title:	ROCK BIT WITH IMPROVED THRUST FACE

Patent #:	6298929	Issue Dt:	10/09/2001	Application #:	09457425	Filing Dt:	12/07/1999
Title:	BI-CENTER BIT ASSEMBLY

Patent #:	6450270	Issue Dt:	09/17/2002	Application #:	09669998	Filing Dt:	09/25/2000
Title:	ROTARY CONE BIT FOR CUTTING REMOVAL

Patent #:	6488106	Issue Dt:	12/03/2002	Application #:	09777295	Filing Dt:	02/05/2001
Title:	SUPERABRASIVE CUTTING ELEMENT

Patent #:	6568492	Issue Dt:	05/27/2003	Application #:	09798171	Filing Dt:	03/02/2001
Publication #:	US20020121393	Pub Dt:	09/05/2002
Title:	DRAG-TYPE CASING MILL/DRILL BIT

Patent #:	6834733	Issue Dt:	12/28/2004	Application #:	10235690	Filing Dt:	09/04/2002
Title:	SPIRAL WAVE BLADED DRAG BIT

Patent #:	6892832	Issue Dt:	05/17/2005	Application #:	10294110	Filing Dt:	11/13/2002
Publication #:	US20030094312	Pub Dt:	05/22/2003
Title:	BREAKABLE WASHER EARTH BORING BIT

Patent #:	6904983	Issue Dt:	06/14/2005	Application #:	10355674	Filing Dt:	01/30/2003
Publication #:	US20040149495	Pub Dt:	08/05/2004
Title:	LOW-CONTACT AREA CUTTING ELEMENT

Patent #:	6926099	Issue Dt:	08/09/2005	Application #:	10397566	Filing Dt:	03/26/2003
Publication #:	US20040188149	Pub Dt:	09/30/2004
Title:	DRILL OUT BI-CENTER BIT AND METHOD FOR USING SAME

Patent #:	6973978	Issue Dt:	12/13/2005	Application #:	10422010	Filing Dt:	04/23/2003
Publication #:	US20040211597	Pub Dt:	10/28/2004
Title:	DRILLING TOOL HAVING AN EXPANDABLE BLADDER AND METHOD FOR USING SAME

Patent #:	7258833	Issue Dt:	08/21/2007	Application #:	10657896	Filing Dt:	09/09/2003
Publication #:	US20050053511	Pub Dt:	03/10/2005
Title:	HIGH-ENERGY CASCADING OF ABRASIVE WEAR COMPONENTS

Assignor

Exec Dt:

11/05/2007

Assignee

1209 ORANGE STREET

C/O CORPORATION TRUST COMPANY

WILMINGTON, DELAWARE 19801

Correspondence name and address
	MILBANK, TWEED, HADLEY & MCCLOY LLP
	ONE CHASE MANHATTAN PLAZA
	RM. 4640
	NEW YORK, NY 10005

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