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Reel/Frame:	026064/0706			Pages:	14
		Recorded:	04/01/2011
Attorney Dkt #:	196006
Conveyance:	RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).

Total properties: 51

Patent #:	5297631	Issue Dt:	03/29/1994	Application #:	08044187	Filing Dt:	04/07/1993
Title:	METHOD AND APPARATUS FOR DOWNHOLE OIL WELL PRODUCTION STIMULATION

Patent #:	5439066	Issue Dt:	08/08/1995	Application #:	08266011	Filing Dt:	06/27/1994
Title:	METHOD AND SYSTEM FOR DOWNHOLE REDIRECTION OF A BOREHOLE

Patent #:	5711382	Issue Dt:	01/27/1998	Application #:	08506955	Filing Dt:	07/26/1995
Title:	AUTOMATED OIL RIG SERVICING SYSTEM

Patent #:	5988299	Issue Dt:	11/23/1999	Application #:	08623041	Filing Dt:	03/28/1996
Title:	AUTOMATED OIL RIG SERVICING SYSTEM

Patent #:	6079490	Issue Dt:	06/27/2000	Application #:	09058477	Filing Dt:	04/10/1998
Title:	REMOTELY ACCESSIBLE MOBILE REPAIR UNIT FOR WELLS

Patent #:	6168054	Issue Dt:	01/02/2001	Application #:	09200490	Filing Dt:	11/25/1998
Title:	OIL RECOVERY SYSTEM AND APPARATUS

Patent #:	6377189	Issue Dt:	04/23/2002	Application #:	09281864	Filing Dt:	03/31/1999
Title:	OIL WELL SERVICING SYSTEM

Patent #:	6212763	Issue Dt:	04/10/2001	Application #:	09342564	Filing Dt:	06/29/1999
Title:	TORQUE-TURN SYSTEM FOR A THREE-ELEMENT SUCKER ROD JOINT

Patent #:	6276449	Issue Dt:	08/21/2001	Application #:	09533511	Filing Dt:	03/23/2000
Title:	Engine speed control for hoist and tongs

Patent #:	6253849	Issue Dt:	07/03/2001	Application #:	09534599	Filing Dt:	03/27/2000
Title:	Method of distinguishing the raising and lowering of tubing and sucker rods

Patent #:	6209639	Issue Dt:	04/03/2001	Application #:	09534601	Filing Dt:	03/27/2000
Title:	METHOD OF ENSURING THAT WELL TUBING WAS PROPERLY STRETCHED

Patent #:	6213207	Issue Dt:	04/10/2001	Application #:	09535239	Filing Dt:	03/27/2000
Title:	Method of distinguishing between installing different sucker rods

Patent #:	6241020	Issue Dt:	06/05/2001	Application #:	09535555	Filing Dt:	03/27/2000
Title:	METHOD OF RECORDING A CROSS-LOAD ON A MOBILE REPAIR UNIT FOR A WELL

Patent #:	6164493	Issue Dt:	12/26/2000	Application #:	09566166	Filing Dt:	05/05/2000
Title:	Oil recovery method

Patent #:	6533519	Issue Dt:	03/18/2003	Application #:	09620580	Filing Dt:	07/20/2000
Title:	PIPE HANDLING APPARATUS

Patent #:	6374706	Issue Dt:	04/23/2002	Application #:	09768551	Filing Dt:	01/25/2001
Title:	SUCKER ROD TOOL

Patent #:	6728638	Issue Dt:	04/27/2004	Application #:	09838857	Filing Dt:	04/23/2001
Publication #:	US20020156582	Pub Dt:	10/24/2002
Title:	METHOD OF MONITORING OPERATIONS OF MULTIPLE SERVICE VEHICLES AT A WELL SITE

Patent #:	6826492	Issue Dt:	11/30/2004	Application #:	09839444	Filing Dt:	04/23/2001
Publication #:	US20020156591	Pub Dt:	10/24/2002
Title:	METHOD OF MANAGING A WELL FILE RECORD AT A WELL SITE

Patent #:	6578634	Issue Dt:	06/17/2003	Application #:	09945924	Filing Dt:	09/05/2001
Publication #:	US20030042020	Pub Dt:	03/06/2003
Title:	METHOD OF MONITORING PUMPING OPERATIONS OF A SERVICE VEHICLE AT A WELL SITE

Patent #:	6758095	Issue Dt:	07/06/2004	Application #:	10046688	Filing Dt:	01/16/2002
Publication #:	US20030188584	Pub Dt:	10/09/2003
Title:	TONGS MONITOR WITH LEARNING MODE

Patent #:	7006009	Issue Dt:	02/28/2006	Application #:	10113609	Filing Dt:	04/01/2002
Publication #:	US20030183382	Pub Dt:	10/02/2003
Title:	SERVICING SYSTEM FOR WELLS

Patent #:	7004456	Issue Dt:	02/28/2006	Application #:	10263630	Filing Dt:	10/03/2002
Publication #:	US20040065874	Pub Dt:	04/08/2004
Title:	ENGINE SPEED LIMITER FOR A HOIST

Patent #:	6898983	Issue Dt:	05/31/2005	Application #:	10292715	Filing Dt:	11/12/2002
Publication #:	US20040089076	Pub Dt:	05/13/2004
Title:	MECHANICAL MULTIPLIER FOR A STRAIN GAGE ON A DERRICK

Patent #:	6719515	Issue Dt:	04/13/2004	Application #:	10389026	Filing Dt:	03/14/2003
Publication #:	US20030147726	Pub Dt:	08/07/2003
Title:	PIPE HANDLING APPARATUS

Patent #:	7064677	Issue Dt:	06/20/2006	Application #:	10440633	Filing Dt:	05/19/2003
Publication #:	US20030196798	Pub Dt:	10/23/2003
Title:	METHOD OF MONITORING SERVICE OPERATIONS OF A SERVICE VEHICLE AT A WELL SITE

Patent #:	7221155	Issue Dt:	05/22/2007	Application #:	10760650	Filing Dt:	01/20/2004
Publication #:	US20040196032	Pub Dt:	10/07/2004
Title:	INVENTORY COUNTER FOR OIL AND GAS WELLS

Patent #:	7029422	Issue Dt:	04/18/2006	Application #:	10778835	Filing Dt:	02/13/2004
Publication #:	US20040192507	Pub Dt:	09/30/2004
Title:	ERGONOMICS SAFETY WARNING DEVICE AND METHOD TO PREVENT CLUTCH BURNING

Patent #:	7228899	Issue Dt:	06/12/2007	Application #:	10778846	Filing Dt:	02/13/2004
Publication #:	US20040188088	Pub Dt:	09/30/2004
Title:	WARNING DEVICE AND METHOD TO PREVENT CLUTCH BURNING

Patent #:	6969223	Issue Dt:	11/29/2005	Application #:	10818575	Filing Dt:	04/06/2004
Publication #:	US20040197166	Pub Dt:	10/07/2004
Title:	PIPE HANDLING APPARATUS

Patent #:	7066266	Issue Dt:	06/27/2006	Application #:	10826783	Filing Dt:	04/16/2004
Publication #:	US20050230117	Pub Dt:	10/20/2005
Title:	METHOD OF TREATING OIL AND GAS WELLS

Patent #:	7226037	Issue Dt:	06/05/2007	Application #:	10925813	Filing Dt:	08/25/2004
Publication #:	US20060163545	Pub Dt:	07/27/2006
Title:	SYSTEM FOR ASSURING ENGAGEMENT OF A HYDROMATIC BRAKE ON A DRILLING OR WELL SERVICE RIG

Patent #:	7461830	Issue Dt:	12/09/2008	Application #:	10942730	Filing Dt:	09/16/2004
Publication #:	US20050114001	Pub Dt:	05/26/2005
Title:	MULTIPLE SENSOR FOR PREVENTING A CROWN-BLOCK INCURSION ON AN OIL WELL RIG

Patent #:	7006920	Issue Dt:	02/28/2006	Application #:	10957309	Filing Dt:	10/01/2004
Publication #:	US20050103491	Pub Dt:	05/19/2005
Title:	ACTIVITY DATA CAPTURE SYSTEM FOR A WELL SERVICE VEHICLE

Patent #:	7114577	Issue Dt:	10/03/2006	Application #:	11066576	Filing Dt:	02/25/2005
Publication #:	US20050199388	Pub Dt:	09/15/2005
Title:	SAFEMODE OPERATING SYSTEM FOR A DRILLING OR SERVICE RIG

Patent #:	7273104	Issue Dt:	09/25/2007	Application #:	11161185	Filing Dt:	07/26/2005
Publication #:	US20060021753	Pub Dt:	02/02/2006
Title:	METHOD OF PUMPING AN "IN-THE-FORMATION" DIVERTING AGENT IN A LATERAL SECTION OF AN OIL AND GAS WELL

Patent #:	7359801	Issue Dt:	04/15/2008	Application #:	11516105	Filing Dt:	09/05/2006
Publication #:	US20070056746	Pub Dt:	03/15/2007
Title:	METHOD AND SYSTEM FOR EVALUATING WEIGHT DATA FROM A SERVICE RIG

Patent #:	7519508	Issue Dt:	04/14/2009	Application #:	11516153	Filing Dt:	09/05/2006
Publication #:	US20070067107	Pub Dt:	03/22/2007
Title:	METHOD AND SYSTEM FOR SETTING AND ANALYZING TUBING TARGET PRESSURES FOR TONGS

Patent #:	7519475	Issue Dt:	04/14/2009	Application #:	11517919	Filing Dt:	09/08/2006
Publication #:	US20070089878	Pub Dt:	04/26/2007
Title:	METHOD FOR DETERMINING BLOCK PROPERTIES OF A SERVICE RIG BY EVALUATING RIG DATA

Patent #:	7513338	Issue Dt:	04/07/2009	Application #:	11517920	Filing Dt:	09/08/2006
Publication #:	US20070056811	Pub Dt:	03/15/2007
Title:	BRAKE SYSTEM FOR A WELL SERVICE OR DRILLING HOIST

Patent #:	7588083	Issue Dt:	09/15/2009	Application #:	11690483	Filing Dt:	03/23/2007
Publication #:	US20080035333	Pub Dt:	02/14/2008
Title:	METHOD AND SYSTEM FOR SCANNING TUBING

Patent #:	7571054	Issue Dt:	08/04/2009	Application #:	11690904	Filing Dt:	03/26/2007
Publication #:	US20080035334	Pub Dt:	02/14/2008
Title:	METHOD AND SYSTEM FOR INTERPRETING TUBING DATA

Patent #:	7672785	Issue Dt:	03/02/2010	Application #:	11691031	Filing Dt:	03/26/2007
Publication #:	US20080035335	Pub Dt:	02/14/2008
Title:	METHOD AND SYSTEM FOR EVALUATING AND DISPLAYING DEPTH DATA

Patent #:	7788054	Issue Dt:	08/31/2010	Application #:	11691163	Filing Dt:	03/26/2007
Publication #:	US20070227225	Pub Dt:	10/04/2007
Title:	METHOD AND SYSTEM FOR CALIBRATING A TUBE SCANNER

Patent #:	7518526	Issue Dt:	04/14/2009	Application #:	11691219	Filing Dt:	03/26/2007
Publication #:	US20080037368	Pub Dt:	02/14/2008
Title:	METHOD AND SYSTEM FOR DISPLAYING SCANNING DATA FOR OIL WELL TUBING BASED ON SCANNING SPEED

Patent #:	7657376	Issue Dt:	02/02/2010	Application #:	11827052	Filing Dt:	07/10/2007
Publication #:	US20070288169	Pub Dt:	12/13/2007
Title:	METHOD AND SYSTEM FOR EVALUATING WEIGHT DATA FROM A SERVICE RIG

Patent #:	7917293	Issue Dt:	03/29/2011	Application #:	11850398	Filing Dt:	09/05/2007
Publication #:	US20090063054	Pub Dt:	03/05/2009
Title:	METHOD AND SYSTEM FOR CONTROLLING A WELL SERVICE RIG BASED ON LOAD DATA

Patent #:	7631563	Issue Dt:	12/15/2009	Application #:	11850405	Filing Dt:	09/05/2007
Publication #:	US20090056467	Pub Dt:	03/05/2009
Title:	METHOD AND SYSTEM FOR EVALUATING ROD BREAKOUT BASED ON TONG PRESSURE DATA

Patent #:	7739918	Issue Dt:	06/22/2010	Application #:	12035259	Filing Dt:	02/21/2008
Title:	ADHESION TESTING DEVICE

Patent #:	8590401	Issue Dt:	11/26/2013	Application #:	12627529	Filing Dt:	11/30/2009
Publication #:	US20100132180	Pub Dt:	06/03/2010
Title:	METHOD AND SYSTEM FOR CONTROLLING TONGS MAKE-UP SPEED AND EVALUATING AND CONTROLLING TORQUE AT THE TONGS

Patent #:	8280639	Issue Dt:	10/02/2012	Application #:	12627542	Filing Dt:	11/30/2009
Publication #:	US20100138159	Pub Dt:	06/03/2010
Title:	METHOD AND SYSTEM FOR MONITORING THE EFFICIENCY AND HEALTH OF A HYDRAULICALLY DRIVEN SYSTEM

Patent #:	8332945	Issue Dt:	12/11/2012	Application #:	12793929	Filing Dt:	06/04/2010
Publication #:	US20100313270	Pub Dt:	12/09/2010
Title:	SYSTEM AND METHOD FOR DETECTING ENERGY CONSUMPTION ANOMALIES AND MOBILE MALWARE VARIANTS

Assignor

BANK OF AMERICA, N.A.

Exec Dt:

03/31/2011

Assignee

KEY ENERGY SERVICES, INC.

1301 MCKINNEY, SUITE 1800

HOUSTON, TEXAS 77010

Correspondence name and address
	JEFF BUTLER/ ANDREWS KURTH LLP
	600 TRAVIS, SUITE 4200
	HOUSTON, TX 77002

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