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Assignee Name : PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Total Assignments: 17
Assignment: 1
Reel/Frame:015819/0450   Pages: 3
Recorded: 09/22/2004
Conveyance: CHANGE OF NAME (SEE DOCUMENT FOR DETAILS).
Assignor
1
COMPUTALOG LTD.
Exec Dt:
12/31/2001
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150 6TH AVENUE S.W.
CALGARY, ALBERTA, CANADA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6742602
US20030041723
10228892
Correspondence name and address
PATRICK H. MCCOLLUM
363 N. SAM HOUSTON PARKWAY EAST
SUITE 1700
HOUSTON, TX 77060
Assignment: 2
Reel/Frame:017230/0980   Pages: 3
Recorded: 02/07/2006
Conveyance: CHANGE OF NAME (SEE DOCUMENT FOR DETAILS).
Assignor
1
COMPUTALOG LTD.
Exec Dt:
12/31/2001
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150 - 6 AVENUE SW
CALGARY ALBERTA, CANADA T2P 3Y7
Properties
 
Pat #
Pub #
Intl #
App #
 
Pat #
Pub #
Intl #
App #
 
Pat #
Pub #
Intl #
App #
 
5067874
NONE
07508974
 
5337821
NONE
08014132
 
5348091
NONE
08107092
 
5660238
NONE
08585799
 
5698982
NONE
08617418
 
5900627
NONE
08878545
 
6002643
NONE
08917624
 
6028307
NONE
08939247
 
6050141
NONE
09141796
 
6189383
NONE
09329215
 
6538958
NONE
09443409
 
6918334
US20040231548
10827597
Correspondence name and address
PATRICK H. MCCOLLUM
SUITE 1700
363 N. SAM HOUSTON PARKWAY EAST
HOUSTON, TEXAS 77060
Assignment: 3
Reel/Frame:017275/0188   Pages: 3
Recorded: 07/01/2005
Conveyance: CHANGE OF NAME (SEE DOCUMENT FOR DETAILS).
Assignor
1
COMPUTALOG LTD.
Exec Dt:
12/31/2001
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150 - 6 AVENUE SW
CALGARY, ALBERTA, CANADA T2P 3Y7
Properties
 
Pat #
Pub #
Intl #
App #
 
Pat #
Pub #
Intl #
App #
 
Pat #
Pub #
Intl #
App #
 
5067874
NONE
07508974
 
5337821
NONE
08014132
 
5348091
NONE
08107092
 
5660238
NONE
08585799
 
5698982
NONE
08617418
 
5900627
NONE
08878545
 
6002643
NONE
08917624
 
6028307
NONE
08939247
 
6050141
NONE
09141796
 
6189383
NONE
09329215
 
6538958
NONE
09443409
 
6918334
US20040231548
10827597
Correspondence name and address
PATRICK H. MCCOLLUM
SUITE 1700
363 N. SAM HOUSTON PARKWAY EAST
HOUSTON, TX 77060
Assignment: 4
Reel/Frame:013292/0664   Pages: 2
Recorded: 09/16/2002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
COMPUTALOG, LTD.
Exec Dt:
01/01/2002
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE S.W.
CALGARY, ALBERTA T2P 3Y7, CANADA
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6585061
US20030070844
09976129
Correspondence name and address
MARK A. OATHOUT
3730 KIRBY DRIVE, SUITE 830
HOUSTON, TX 77098
Assignment: 5
Reel/Frame:012519/0238   Pages: 3
Recorded: 01/19/2002
Conveyance: INVALID RECORDING, SEE DOCUMENT AT REEL 012519, FRAME 0329. (RE-RECORD TO CORRECT THE SERIAL NUMBER ASSIGNED BY THE PTO)
Assignors
1
THOMPSON, LARRY W.
Exec Dt:
01/10/2002
2
WISLER, MACMILLAN M.
Exec Dt:
01/10/2002
3
WU, JIAN-QUN
Exec Dt:
01/10/2002
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE SW
CALGARY, ALBERTA T2P 3
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6577129
NONE
10053041
Correspondence name and address
PATRICK H. MCCOLLUM
363 N. SAM HOUSTON PARKWAY EAST
SUITE 1700
HOUSTON, TEXAS 77060
Assignment: 6
Reel/Frame:012519/0329   Pages: 3
Recorded: 01/19/2002
Conveyance: INVALID RECORDING: SEE DOCUMENT AT REEL 012842 FRAME 0121. (RE-RECORDED TO CORRECT THE SERIAL NUMBER ERRONEOUSLY ASSIGNED BY THE PTO)
Assignors
1
THOMPSON. LARRY W.
Exec Dt:
01/10/2002
2
WISLER, MACMILLAN M.
Exec Dt:
01/10/2002
3
WU, JIAN-QUN
Exec Dt:
01/10/2002
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150- 6TH AVENUE SW
CALGARY, AB, CANADA T2P 3
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6646441
US20030137301
10053043
Correspondence name and address
PATRICK H. MCCOLLUM
363 N. SAM HOUSTON PARKWAY EAST
SUITE 1700
HOUSTON, TEXAS 77060
Assignment: 7
Reel/Frame:013257/0799   Pages: 2
Recorded: 09/04/2002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
COMPUTALOG, LTD.
Exec Dt:
02/07/2002
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE S.W.
CALGARY, ALBERTA T2P 3Y7, CANADA
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
US20010052428
09881149
Correspondence name and address
MARK A. OATHOUT
3730 KIRBY DRIVE, SUITE 830
HOUSTON, TX 77098
Assignment: 8
Reel/Frame:013259/0033   Pages: 2
Recorded: 09/03/2002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
COMPUTALOG, LTD.
Exec Dt:
02/07/2002
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE S.W.
CALGARY, ALBERTA T2P 3Y7, CANADA
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6703837
NONE
09662973
Correspondence name and address
MARK A. OATHOUT
3730 KIRBY DRIVE, SUITE 830
HOUSTON, TEXAS 77098
Assignment: 9
Reel/Frame:014197/0484   Pages: 3
Recorded: 06/20/2003
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
SERAFIN, WITOLD P.
Exec Dt:
06/12/2003
2
SHKURTI, PIRO T.
Exec Dt:
06/11/2003
3
TATE, BARRY J.
Exec Dt:
06/11/2003
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
#4200, 1500-6TH AVENUE SW
CALGARY, AB, CANADA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
6782954
US20030111236
10303982
Correspondence name and address
GOODWIN MCKAY
SEAN W. GOODWIN
237-8TH AVENUE SW
SUITE 360
CALGARY, AB CANADA T2G 5C3
Assignment: 10
Reel/Frame:015135/0504   Pages: 2
Recorded: 03/24/2004
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
STEINER, ADRIAN
Exec Dt:
02/11/2004
2
GROSSMAN, MIKE FREDRIC
Exec Dt:
02/11/2004
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4600 PETRO-CANADA CENTRE
150-6TH AVENUE S.W.
CALGARY, ALBERTA, CANADA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7702423
US20050119796
10807372
Correspondence name and address
MEREK, BLACKMON & VOORHEES, LLC
DAVID H. VOORHEES
673 SOUTH WASHINGTON STREET
ALEXANDRIA, VA 22314
Assignment: 11
Reel/Frame:015726/0978   Pages: 4
Recorded: 08/24/2004
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
MICKAEL, MEDHAT W.
Exec Dt:
08/10/2004
2
JONES, DALE A.
Exec Dt:
08/10/2004
3
PHELPS, DONALD A.
Exec Dt:
08/10/2004
4
WRIGHT, JOHN E.
Exec Dt:
08/10/2004
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE SW
CALGARY, ALBERTA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7253401
US20050199794
10809066
Correspondence name and address
PATRICK H. MCCOLLUM
363 N. SAM HOUSTON PARKWAY EAST
SUITE 1700
HOUSTON, MA 77060
Assignment: 12
Reel/Frame:015862/0863   Pages: 3
Recorded: 09/29/2004
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
BLANKINSHIP, THOMAS J.
Exec Dt:
09/27/2004
2
ROBERTS, EDWIN K.
Exec Dt:
09/27/2004
3
TELLO, LUCIO N.
Exec Dt:
09/27/2004
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE SW
CALGARY, ALBERTA, CANADA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
US20060067162
10954124
Correspondence name and address
PATRICK H. MCCOLLUM
363 N. SAM HOUSTON PARKWAY EAST
SUITE 1700
HOUSTON, TX 77060
Assignment: 13
Reel/Frame:016257/0318   Pages: 3
Recorded: 02/01/2005
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
MICKAEL, MEDHAT W.
Exec Dt:
09/29/2004
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE SW
CALGARY, ALBERTA, CANADA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
US20060067162
10954124
Correspondence name and address
PATRICK H. MCCOLLUM
363 N. SAM HOUSTON PARKWAY EAST
SUITE 1700
HOUSTON, TX 77060
Assignment: 14
Reel/Frame:016311/0776   Pages: 3
Recorded: 07/26/2005
Conveyance: CORRECTIVE ASSIGNMENT TO CORRECT THE SERIAL NUMBER PREVIOUSLY RECORDED ON REEL 016257 FRAME 0318. ASSIGNOR(S) HEREBY CONFIRMS THE CORRECTION OF THE SERIAL NUMBER FROM 10/954,124 TO 11/050,005.
Assignor
1
MICKAEL, MR. MEDHAT W.
Exec Dt:
09/29/2004
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
150 - 6TH AVENUE SW
4200
CALGARY, CANADA T2P3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7202456
US20060065824
11050005
Correspondence name and address
PATRICK H. MCCOLLUM
363 N. SAM HOUSTON PARKWAY E.
SUITE 1700
HOUSTON, TX 77060
Assignment: 15
Reel/Frame:017497/0010   Pages: 2
Recorded: 04/19/2006
Attorney Dkt #:PDHO013
Conveyance: NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS).
Assignor
1
COMPUTALOG U.S.A., INC.
Exec Dt:
10/15/2004
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE S.W.
CALGARY, ALBERTA, CANADA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7518527
US20060066301
10511739
Correspondence name and address
MARK A. OATHOUT
3701 KIRBY DRIVE
SUITE 960
HOUSTON, TX 77098
Assignment: 16
Reel/Frame:016002/0820   Pages: 3
Recorded: 11/16/2004
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
MICKAEL, MEDHAT
Exec Dt:
11/15/2004
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150-6TH AVENUE SW
CALGARY, ALBERTA, CANADA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7151254
US20060102834
10990174
Correspondence name and address
PATRICK H. MCCOLLUM
363 N. SAM HOUSTON PARKWAY E.
SUITE 1700
HOUSTON, TX 77060
Assignment: 17
Reel/Frame:017973/0868   Pages: 3
Recorded: 11/21/2005
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
STAYTON, ROBERT JOSEPH
Exec Dt:
11/16/2005
Assignee
1
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200 150-6TH AVENUE S.W.
CALGARY, ALBERTA, CANADA T2P 3Y7
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
7513304
US20060266517
10557573
Correspondence name and address
R. SCOTT REESE
WONG CABELLO LUTSCH RUTHERFORD ET AL.
20333 SH 249, SUITE 600
HOUSTON, TX 77070

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