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Patent Assignment Assignor Details

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Assignor Name : DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Total Assignments: 8

Assignment: 1

Reel/Frame:	006032/0203			Pages:	23
		Recorded:	02/27/1992
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Exec Dt:

02/21/1992

Assignee

CHEMICAL VENTURE CAPITAL ASSOCIATES

A CALIFORNIA LIMITE PARTNERSHIP

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4492666	NONE		06364474	4438783	NONE		06366981	4610362	NONE		06400096
4487229	NONE		06503419	4599778	NONE		06643476	4706822	NONE		06811695
4662402	NONE		06894705	4772198	NONE		06909635	4824143	NONE		07105790
4957141	NONE		07212795

Correspondence name and address
	JACKSON & WALKER, L.L.P.
	WILLIAM C. NORVELL, JR.
	1100 LOUISIANA, SUITE 4200
	P.O. BOX 4771
	HOUSTON, TX 77210-4771

Assignment: 2

Reel/Frame:	008723/0183			Pages:	12
		Recorded:	10/30/1997
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignors

DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Exec Dt:

07/31/1997

DRILLTEC TECHNOLOGIES, INC.

Exec Dt:

07/31/1997

DRILLTEC INTERNATIONAL LIMITED

Exec Dt:

07/31/1997

DRILLTEC INDONESIA, INC.

Exec Dt:

07/31/1997

Assignee

HELLER FINANCIAL, INC.

500 WEST MONROE STREET

CHICAGO, ILLINOIS 60661

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4492666	NONE		06364474	4438783	NONE		06366981	4610362	NONE		06400096
4487229	NONE		06503419	4599778	NONE		06643476	4706822	NONE		06811695
4662402	NONE		06894705	4772198	NONE		06909635	4809752	NONE		07044838
4824143	NONE		07105790	4957141	NONE		07212795	5195562	NONE		07531107
5123547	NONE		07654586	5244015	NONE		07865712	5244015	NONE		07865712
5267648	NONE		07907718	5267648	NONE		07907718	5460566	NONE		08016724
5556320	NONE		08178737	5743790	NONE		08507635

Correspondence name and address
	WINSTEAD SECHREST & MINICK P.C.
	PHILIP T. GOLDEN
	910 TRAVIS STREET, SUITE 1700
	HOUSTON, TX 77002-5895

Assignment: 3

Reel/Frame:	009414/0400			Pages:	9
		Recorded:	09/03/1998
Conveyance:	SECURITY AGREEMENT

Assignor

DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Exec Dt:

08/18/1998

Assignee

FIRST SOURCE FINANCIAL LLP

2850 W. GOLF ROAD - 5TH FLOOR

ROLLING, ILLINOIS 60008

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4492666	NONE		06364474	4438783	NONE		06366981	4610362	NONE		06400096
4487229	NONE		06503419	4599778	NONE		06643476	4706822	NONE		06811695
4662402	NONE		06894705	4772198	NONE		06909635	4809752	NONE		07044838
4957141	NONE		07212795	5195562	NONE		07531107	5046986	NONE		07574467
5123547	NONE		07654586	5244015	NONE		07865712	5267648	NONE		07907718
5556320	NONE		08178737

Correspondence name and address
	FEDERAL RESEARCH CORP.
	NANCY A. BUTLER
	400 SEVENTH ST., N.W., SUITE 101
	WASHINGTON, D.C. 20004

Assignment: 4

Reel/Frame:	009445/0819			Pages:	13
		Recorded:	09/14/1998
Conveyance:	SECURITY AGREEMENT

Assignor

DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Exec Dt:

08/18/1998

Assignee

ALLIED CAPITAL CORPORATION

1666 K STREET, N.W.

WASHINGTON, DISTRICT OF COLUMBIA 20006

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4492666	NONE		06364474	4438783	NONE		06366981	4610362	NONE		06400096
4487229	NONE		06503419	4599778	NONE		06643476	4706822	NONE		06811695
4662402	NONE		06894705	4772198	NONE		06909635	4809752	NONE		07044838
4957141	NONE		07212795	5195562	NONE		07531107	5046986	NONE		07574467
5123547	NONE		07654586	5244015	NONE		07865712	5267648	NONE		07907718
5556320	NONE		08178737

Correspondence name and address
	FEDERAL RESEARCH CORP.
	NANCY A. BUTLER
	400 SEVENTH STREET, N.W.
	SUITE 101
	WASHINGTON, D.C 2004

Assignment: 5

Reel/Frame:	010310/0696			Pages:	9
		Recorded:	10/20/1999
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Exec Dt:

09/09/1999

Assignee

FIRST SOURCE FINANCIAL LLP

5TH FLOOR

2850 W. GOLF ROAD

ROLLING MEADOWS, ILLINOIS 60008

Properties

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

5460566

NONE

08016724

5558320

NONE

08148584

5743790

NONE

08507635

6261037

NONE

09120574

6196270

NONE

09315865

0415265

NONE

UNAVAILABLE

Correspondence name and address
	FEDERAL RESEARCH CORP.
	400 SEVENTH ST. NW
	SUITE 101
	WASHINGTON, DC 20004

Assignment: 6

Reel/Frame:	011523/0614			Pages:	13
		Recorded:	02/15/2001
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Exec Dt:

11/15/2000

Assignees

ALLIED CAPITAL CORPORATION

3RD FLOOR

1919 PENNSYLVANIA AVENUE

WASHINGTON, DISTRICT OF COLUMBIA 20006

EQUUS II INCORPORATED

SUITE 2500

2929 ALLEN PARKWAY

HOUSTON, TEXAS 77019

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4438783	NONE		06366981	4610362	NONE		06400096	4599778	NONE		06643476
4662402	NONE		06894705	4772198	NONE		06909635	4809752	NONE		07044838
4957141	NONE		07212795	5195562	NONE		07531107	5123547	NONE		07654586
5244015	NONE		07865712	5267648	NONE		07907718	5460566	NONE		08016724
5556320	NONE		08178737	5743790	NONE		08507635	6585577	NONE		08953695
6261037	NONE		09120574	6196270	NONE		09315865

Correspondence name and address
	DICKSTEIN SHAPIRO MORIN & OSHINSKY LLP
	WILLIAM E. POWELL, III
	2101 L STREET NW
	WASHINGTON, DC 20037-1526

Assignment: 7

Reel/Frame:	012707/0705			Pages:	9
		Recorded:	03/26/2002
Conveyance:	SECURITY AGREEMENT

Assignor

DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Exec Dt:

02/14/2002

Assignee

FIRST SOURCE FINANCIAL, INC., AS AGENT

2850 WEST FOLF ROAD, FIFTH FLOOR

ROLLING MEADOWOS, ILLINOIS 60008

Properties

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

5460566

NONE

08016724

5743790

NONE

08507635

Correspondence name and address
	FEDERAL RESEARCH CORP.
	REBECCA L. FOLEY
	400 SEVENTH STREET NW
	SUITE 101
	WASHINGTON, DC 20004

Assignment: 8

Reel/Frame:	014409/0331			Pages:	8
		Recorded:	08/26/2003
Conveyance:	SECURITY AGREEMENT

Assignor

DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.

Exec Dt:

08/01/2003

Assignee

FIRST SOURCE FINANCIAL, INC., AS AGENT

2850 WEST GOLF ROAD, FIFTH FLOOR

ROLLING MEADOWS, ILLINOIS 60008

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
6585577	NONE		08953695	6367508	NONE		09799163	7419198	US20030201653		10133008
6848584	US20040060856		10255504	6676422	NONE		10262244	7080864	US20030205907		10355499

Correspondence name and address
	FEDERAL RESEARCH COMPANY, LLC
	REBECCA L. FOLEY
	1030 15TH STREET, NW, SUITE 920
	WASHINGTON, DC 20005

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