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Trademark Assignment Assignor Details

Assignor Name : HALLIBURTON GEOPHYSICAL SERVICES, INC.

Total Assignments: 3

Assignment: 1

Reel/Frame:	1163/0401			Pages:	10
		Recorded:	06/07/1994
Conveyance:	MERGER EFFECTIVE 7-1-93 (SEE DOC. FOR DETAILS)

Assignors

SIERRA GEOPHYSICS, INC.

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	CALIFORNIA

HALLIBURTON GEOPHYSICAL SERVICES, INC.

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	DELAWARE

HALLIBURTON LOGGING SERVICES, INC.

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	TEXAS

OTIS ENGINEERING CORPORATION

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	OREGON

HGS INCORPORATED MERGED INTO

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	NEVADA

Assignee

HALLIBURTON COMPANY

POST OFFICE BOX 1431

1015 BOIS D'ARC DUNCAN, OK 73536-0112

Entity Type:	CORPORATION
Citizenship:	DELAWARE

Properties

Ser. #	Reg. #	Ser. #	Reg. #	Ser. #	Reg. #	Ser. #	Reg. #	Ser. #	Reg. #
73218076	1185205	73480205	1319165	73480206	1319166	73480208	1319167	73520558	1353842
73546523	1406531	73631907	1449450	73631982	1771131	73632011	1447311	73669128	1488898
73669129	1503653	73669130	1474844	73669156	1482220	73705837	1505667	73823978	1598344
74001411	NONE	74002742	NONE	74023491	1737406

Correspondence name and address
	HALLIBURTON ENERGY SERVICES
	ROBERT A. KENT
	POST OFFICE BOX 1431
	1015 BOIS D'ARC
	DUNCAN, OK 73536-0102

Assignment: 2

Reel/Frame:	1201/0361			Pages:	8
		Recorded:	08/24/1994
Conveyance:	MERGER AND CHANGE OF NAME EFFECTIVE 6-25-93

Assignors

HALLIBURTON GEOPHYSICAL SERVICES, INC.

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	DELAWARE

HALLIBURTON LOGGING SERVICES, INC.

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	TEXAS

OTIS ENGINEERING CORPORATION

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	DELAWARE

HGS INCORPORATED

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	NEVADA

SIERRA GEOPHISICS, INC.

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	CALIFORNIA

Assignee

HALLIBURTON COMPANY

LEGAL, INTELLECTUAL PROPERTY DEPARTMENT

2601 BELTLINE ROAD CARROLLTON, TX 75006

Entity Type:	CORPORATION
Citizenship:	DELAWARE

Property

Ser. #

Reg. #

74393444

NONE

Correspondence name and address
	TRACY W. DRUCE
	LEGAL, INTELLECTUAL PROPERTY DEPT.
	HALLIBURTON COMPANY
	2601 BELTLINE ROAD
	CARROLLTON, TX 75006

Assignment: 3

Reel/Frame:	1544/0853			Pages:	10
		Recorded:	11/22/1993
Conveyance:	CHANGE OF NAME

Assignor

HALLIBURTON GEOPHYSICAL SERVICES, INC.

Exec Dt:	06/24/1993
Entity Type:	CORPORATION
Citizenship:	NONE

Assignee

HALLIBURTON COMPANY

1015 BOIS D'ARC

P.O. BOX 1431

DUNCAN, OKLAHOMA 73535-0102

Entity Type:	CORPORATION
Citizenship:	NONE

Properties

Ser. #	Reg. #	Ser. #	Reg. #	Ser. #	Reg. #	Ser. #	Reg. #	Ser. #	Reg. #
71537579	507722	71694437	640159	72025771	670016	73018802	1015277	73025816	1033277
73025817	1012195	73025836	1007881	73062221	1055733	73074466	1089847	73075870	1056509
73095178	1089849	73104546	1085738	73146075	1102591	73204570	1149670	73204627	1149671
73204628	1149672	73466527	1316757	73836918	1622200	74034325	1625797

Correspondence name and address
	HALLIBURTON ENERGY SERVICES
	ROBERT A. KENT
	P.O. BOX 1431
	1015 BOIS D'ARC
	DUNCAN, OK 73536-0102

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