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Patent Assignment Assignor Details

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Assignor Name : POWER CHOKES, L.P.

Total Assignments: 3

Assignment: 1

Reel/Frame:	015008/0320			Pages:	6
		Recorded:	08/20/2004
Conveyance:	SECURITY AGREEMENT

Assignor

POWER CHOKES, L.P.

Exec Dt:

07/30/2004

Assignee

BANK OF AMERICA, N.A.

901 MAIN STREET

DALLAS, TEXAS 75202

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4640363	NONE		06764391	4880060	NONE		07238741	5212990	NONE		07684084
5368447	NONE		07809821	5295817	NONE		07932438	5338001	NONE		07977384
5636980	NONE		08226599	5551665	NONE		08236787	5782304	NONE		08757714
5803170	NONE		08800696	6125938	NONE		08907556	5993196	NONE		08918156
5884707	NONE		09076316	5884703	NONE		09076338	5894890	NONE		09076450
5884708	NONE		09076603	6446664	NONE		09661526

Correspondence name and address
	CONSTANCE GALL RHEBERGEN
	P.O. BOX 61389
	HOUSTON, TX 77208-1389

Assignment: 2

Reel/Frame:	015361/0234			Pages:	7
		Recorded:	11/16/2004
Conveyance:	SECURITY AGREEMENT SUPPLEMENT

Assignor

POWER CHOKES, L.P.

Exec Dt:

07/30/2004

Assignee

BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT

901 MAIN STREET

MAIL CODE: TX-492-14-11

DALLAS, TEXAS 75292

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4640363	NONE		06764391	4880060	NONE		07238741	5212990	NONE		07684084
5368447	NONE		07809821	5295817	NONE		07932438	5338001	NONE		07977384
5636980	NONE		08226599	5551665	NONE		08236787	5782304	NONE		08757714
5803170	NONE		08800696	6125938	NONE		08907556	5993196	NONE		08918156
5884707	NONE		09076316	5884703	NONE		09076338	5894890	NONE		09076450
5884708	NONE		09076603	6446664	NONE		09661526	7124770	US20050072464		10760910
NONE	US20040217050		10781186	6883614	US20040216888		10832778	7159604	US20050236046		10832779
NONE	US20050006150		10880640

Correspondence name and address
	MOORE & VAN ALLEN PLLC
	430 DAVIS DRIVE
	SUITE 500
	MORRISVILLE, NC 27560

Assignment: 3

Reel/Frame:	016408/0583			Pages:	5
		Recorded:	08/17/2005
Conveyance:	CHANGE OF NAME (SEE DOCUMENT FOR DETAILS).

Assignor

POWER CHOKES, L.P.

Exec Dt:

09/17/2004

Assignee

POWER WELL SERVICES, L.P.

12777 JONES RD.

SUITE 280

HOUSTON, TEXAS 77070

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4640363	NONE		06764391	4880060	NONE		07238741	5212990	NONE		07684084
5368447	NONE		07809821	5295817	NONE		07932438	5338001	NONE		07977384
5636980	NONE		08226599	5551665	NONE		08236787	5782304	NONE		08757714
5803170	NONE		08800696	6125938	NONE		08907556	5993196	NONE		08918156
5884707	NONE		09076316	5884703	NONE		09076338	5894890	NONE		09076450
5884708	NONE		09076603	6446664	NONE		09661526	7124770	US20050072464		10760910
NONE	US20040217050		10781186	6883614	US20040216888		10832778	7159604	US20050236046		10832779
NONE	US20050006150		10880640	NONE	US20050092523		10974355

Correspondence name and address
	JESSICA GREENEY
	1001 FANNIN ST., SUITE 2300
	FIRST CITY TOWER
	HOUSTON, TX 77002-6760

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