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Reel/Frame:	005169/0319			Pages:	3
		Recorded:	11/02/1988
Conveyance:	CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE OCTOBER 11, 1988 (DELAWARE)

Total properties: 173
Page 1 of 2
Pages: 1 2

Patent #:	3800891	Issue Dt:	04/02/1974	Application #:	04730671	Filing Dt:	04/18/1968
Title:	HARDFACING COMPOSITIONS AND GAGE HARDFACING ON ROLLING CUTTER ROCK BIT S

Patent #:	3714993	Issue Dt:		Application #:	05091699	Filing Dt:
Title:

Patent #:	3746329	Issue Dt:		Application #:	05195999	Filing Dt:
Title:

Patent #:	3730269	Issue Dt:		Application #:	05200913	Filing Dt:
Title:

Patent #:	3730269	Issue Dt:		Application #:	05200913	Filing Dt:
Title:

Patent #:	3727705	Issue Dt:		Application #:	05219669	Filing Dt:
Title:

Patent #:	3727705	Issue Dt:		Application #:	05219669	Filing Dt:
Title:

Patent #:	3860902	Issue Dt:		Application #:	05332468	Filing Dt:
Title:

Patent #:	3860902	Issue Dt:		Application #:	05332468	Filing Dt:
Title:

Patent #:	3842907	Issue Dt:		Application #:	05332471	Filing Dt:
Title:

Patent #:	3842907	Issue Dt:		Application #:	05332471	Filing Dt:
Title:

Patent #:	3850135	Issue Dt:		Application #:	05332472	Filing Dt:
Title:

Patent #:	3850135	Issue Dt:		Application #:	05332472	Filing Dt:
Title:

Patent #:	3845994	Issue Dt:		Application #:	05349045	Filing Dt:
Title:

Patent #:	3845994	Issue Dt:		Application #:	05349045	Filing Dt:
Title:

Patent #:	3876016	Issue Dt:		Application #:	05373205	Filing Dt:
Title:

Patent #:	3876016	Issue Dt:		Application #:	05373205	Filing Dt:
Title:

Patent #:	3842921	Issue Dt:	10/22/1974	Application #:	05387565	Filing Dt:	08/10/1973
Title:	BORONIZED DRILL BIT CUTTERS

Patent #:	3842921	Issue Dt:	10/22/1974	Application #:	05387565	Filing Dt:	08/10/1973
Title:	BORONIZED DRILL BIT CUTTERS

Patent #:	3922038	Issue Dt:	11/25/1975	Application #:	05387566	Filing Dt:	08/10/1973
Title:	WEAR RESISTANT BORONIZED SURFACES AND BORONIZING

Patent #:	3922038	Issue Dt:	11/25/1975	Application #:	05387566	Filing Dt:	08/10/1973
Title:	WEAR RESISTANT BORONIZED SURFACES AND BORONIZING

Patent #:	4019670	Issue Dt:		Application #:	05435172	Filing Dt:
Title:

Patent #:	3942596	Issue Dt:		Application #:	05466641	Filing Dt:
Title:

Patent #:	3942596	Issue Dt:		Application #:	05466641	Filing Dt:
Title:

Patent #:	3941197	Issue Dt:		Application #:	05484837	Filing Dt:
Title:

Patent #:	3941197	Issue Dt:		Application #:	05484837	Filing Dt:
Title:

Patent #:	3918538	Issue Dt:		Application #:	05484838	Filing Dt:
Title:

Patent #:	3918538	Issue Dt:		Application #:	05484838	Filing Dt:
Title:

Patent #:	3913988	Issue Dt:		Application #:	05527110	Filing Dt:
Title:

Patent #:	3935114	Issue Dt:		Application #:	05529302	Filing Dt:
Title:

Patent #:	3935114	Issue Dt:		Application #:	05529302	Filing Dt:
Title:

Patent #:	3946817	Issue Dt:		Application #:	05535871	Filing Dt:
Title:

Patent #:	3946817	Issue Dt:		Application #:	05535871	Filing Dt:
Title:

Patent #:	3986565	Issue Dt:	10/19/1976	Application #:	05536529	Filing Dt:	12/26/1974
Title:	EXHAUST MEANS FOR PERCUSSION TOOL MOTORS

Patent #:	3986565	Issue Dt:	10/19/1976	Application #:	05536529	Filing Dt:	12/26/1974
Title:	EXHAUST MEANS FOR PERCUSSION TOOL MOTORS

Patent #:	3970158	Issue Dt:	07/20/1976	Application #:	05572545	Filing Dt:	04/28/1975
Title:	TOOTH LOADING FOR EARTH BORING BITS

Patent #:	3970158	Issue Dt:	07/20/1976	Application #:	05572545	Filing Dt:	04/28/1975
Title:	TOOTH LOADING FOR EARTH BORING BITS

Patent #:	4014595	Issue Dt:		Application #:	05582492	Filing Dt:
Title:

Patent #:	4014595	Issue Dt:		Application #:	05582492	Filing Dt:
Title:

Patent #:	4019785	Issue Dt:		Application #:	05582506	Filing Dt:
Title:

Patent #:	4019785	Issue Dt:		Application #:	05582506	Filing Dt:
Title:

Patent #:	4012238	Issue Dt:		Application #:	05616537	Filing Dt:
Title:

Patent #:	4012238	Issue Dt:		Application #:	05616537	Filing Dt:
Title:

Patent #:	4211508	Issue Dt:		Application #:	05657990	Filing Dt:
Title:

Patent #:	4211508	Issue Dt:		Application #:	05657990	Filing Dt:
Title:

Patent #:	4055225	Issue Dt:	10/25/1977	Application #:	05687131	Filing Dt:	05/17/1976
Title:	LUBRICANT PRESSURE COMPENSATOR FOR AN EARTH BORING DRILL BIT

Patent #:	4055225	Issue Dt:	10/25/1977	Application #:	05687131	Filing Dt:	05/17/1976
Title:	LUBRICANT PRESSURE COMPENSATOR FOR AN EARTH BORING DRILL BIT

Patent #:	RE29300	Issue Dt:		Application #:	05719204	Filing Dt:
Title:

Patent #:	RE29300	Issue Dt:		Application #:	05719204	Filing Dt:
Title:

Patent #:	4108260	Issue Dt:		Application #:	05783924	Filing Dt:
Title:

Patent #:	4108260	Issue Dt:		Application #:	05783924	Filing Dt:
Title:

Patent #:	4276946	Issue Dt:	07/07/1981	Application #:	05885723	Filing Dt:	03/13/1978
Title:	BIASED LUBRICANT COMPENSATOR FOR AN EARTH BORING DRILL BIT

Patent #:	4145034	Issue Dt:		Application #:	05887405	Filing Dt:
Title:

Patent #:	4188242	Issue Dt:		Application #:	05915094	Filing Dt:
Title:

Patent #:	4188242	Issue Dt:		Application #:	05915094	Filing Dt:
Title:

Patent #:	4202490	Issue Dt:	05/13/1980	Application #:	05918640	Filing Dt:	06/23/1978
Title:	DRILL PIPE IDENTIFICATION METHOD AND SYSTEM

Patent #:	4209124	Issue Dt:		Application #:	05923835	Filing Dt:
Title:

Patent #:	4236764	Issue Dt:	12/02/1980	Application #:	06006706	Filing Dt:	01/26/1979
Title:	EARTH BORING DRILL BIT WITH SNAP RING CUTTER RETENTION

Patent #:	4236764	Issue Dt:	12/02/1980	Application #:	06006706	Filing Dt:	01/26/1979
Title:	EARTH BORING DRILL BIT WITH SNAP RING CUTTER RETENTION

Patent #:	4210316	Issue Dt:		Application #:	06007264	Filing Dt:
Title:

Patent #:	4301877	Issue Dt:	11/24/1981	Application #:	06128695	Filing Dt:	03/10/1980
Title:	CLAD MUD NOZZLE

Patent #:	4386667	Issue Dt:	06/07/1983	Application #:	06145549	Filing Dt:	05/01/1980
Title:	PLUNGER LUBRICANT COMPENSATOR FOR AN EARTH BORING DRILL BIT

Patent #:	4386667	Issue Dt:	06/07/1983	Application #:	06145549	Filing Dt:	05/01/1980
Title:	PLUNGER LUBRICANT COMPENSATOR FOR AN EARTH BORING DRILL BIT

Patent #:	4343372	Issue Dt:	08/10/1982	Application #:	06161701	Filing Dt:	06/23/1980
Title:	GAGE ROW STRUCTURE OF AN EARTH BORING DRILL BIT

Patent #:	4344658	Issue Dt:	08/17/1982	Application #:	06174483	Filing Dt:	08/01/1980
Title:	EARTH BORING DRILL BIT WITH SNAP RING CUTTER RETENTION

Patent #:	4375242	Issue Dt:	03/01/1983	Application #:	06177292	Filing Dt:	08/11/1980
Title:	SEALED AND LUBRICATED ROCK BIT WITH AIR PROTECTED SEAL RING

Patent #:	4375242	Issue Dt:	03/01/1983	Application #:	06177292	Filing Dt:	08/11/1980
Title:	SEALED AND LUBRICATED ROCK BIT WITH AIR PROTECTED SEAL RING

Patent #:	4359113	Issue Dt:	11/16/1982	Application #:	06184708	Filing Dt:	09/08/1980
Title:	EARTH BORING BIT WITH EXTENDED GAGE

Patent #:	4359113	Issue Dt:	11/16/1982	Application #:	06184708	Filing Dt:	09/08/1980
Title:	EARTH BORING BIT WITH EXTENDED GAGE

Patent #:	4386668	Issue Dt:	06/07/1983	Application #:	06188443	Filing Dt:	09/19/1980
Title:	SEALED LUBRICATED AND AIR COOLED ROCK BIT BEARING

Patent #:	4431066	Issue Dt:	02/14/1984	Application #:	06235481	Filing Dt:	02/18/1981
Title:	STRESSED RELIEVED BIT LEG FOR AN EARTH BORING BIT

Patent #:	4386663	Issue Dt:	06/07/1983	Application #:	06238258	Filing Dt:	02/25/1981
Title:	COOLED JOURNAL BEARING

Patent #:	4386663	Issue Dt:	06/07/1983	Application #:	06238258	Filing Dt:	02/25/1981
Title:	COOLED JOURNAL BEARING

Patent #:	4406337	Issue Dt:	09/27/1983	Application #:	06249583	Filing Dt:	03/31/1981
Title:	INSERT WITH LOCKING PROJECTION

Patent #:	4406337	Issue Dt:	09/27/1983	Application #:	06249583	Filing Dt:	03/31/1981
Title:	INSERT WITH LOCKING PROJECTION

Patent #:	4400024	Issue Dt:	08/23/1983	Application #:	06288712	Filing Dt:	07/31/1981
Title:	NOZZLE RETAINING RING WITH CRUSHED O-RING

Patent #:	4402495	Issue Dt:	09/06/1983	Application #:	06311500	Filing Dt:	10/15/1981
Title:	DRILL STRING SHOCK ABSORBER WITH PRESSURIZED LUBRICANT SYSTEM

Patent #:	4491428	Issue Dt:	01/01/1985	Application #:	06325608	Filing Dt:	11/27/1981
Title:	EARTH BORING DRILL BIT WITH SNAP RING CUTTER RETENTION

Patent #:	4414734	Issue Dt:	11/15/1983	Application #:	06326083	Filing Dt:	11/30/1981
Title:	TRIAD FOR ROCK BIT ASSEMBLY

Patent #:	4414734	Issue Dt:	11/15/1983	Application #:	06326083	Filing Dt:	11/30/1981
Title:	TRIAD FOR ROCK BIT ASSEMBLY

Patent #:	4445734	Issue Dt:	05/01/1984	Application #:	06327524	Filing Dt:	12/04/1981
Title:	TELEMETRY DRILL PIPE WITH PRESSURE SENSITIVE CONTACTS

Patent #:	4445734	Issue Dt:	05/01/1984	Application #:	06327524	Filing Dt:	12/04/1981
Title:	TELEMETRY DRILL PIPE WITH PRESSURE SENSITIVE CONTACTS

Patent #:	4451162	Issue Dt:	05/29/1984	Application #:	06389782	Filing Dt:	06/18/1982
Title:	SPACED BUTTON THRUST SURFACE FOR EARTH BORING BIT

Patent #:	4451162	Issue Dt:	05/29/1984	Application #:	06389782	Filing Dt:	06/18/1982
Title:	SPACED BUTTON THRUST SURFACE FOR EARTH BORING BIT

Patent #:	4507843	Issue Dt:	04/02/1985	Application #:	06448671	Filing Dt:	12/10/1982
Title:	CLAMPING ASSEMBLY

Patent #:	4507843	Issue Dt:	04/02/1985	Application #:	06448671	Filing Dt:	12/10/1982
Title:	CLAMPING ASSEMBLY

Patent #:	4428687	Issue Dt:	01/31/1984	Application #:	06497217	Filing Dt:	05/27/1983
Title:	FLOATING SEAL FOR EARTH BORING BIT

Patent #:	4428687	Issue Dt:	01/31/1984	Application #:	06497217	Filing Dt:	05/27/1983
Title:	FLOATING SEAL FOR EARTH BORING BIT

Patent #:	4516641	Issue Dt:	05/14/1985	Application #:	06542801	Filing Dt:	10/17/1983
Title:	EARTH BORING BIT WITH PRESSURE COMPENSATING RIGID FACE SEAL

Patent #:	4516641	Issue Dt:	05/14/1985	Application #:	06542801	Filing Dt:	10/17/1983
Title:	EARTH BORING BIT WITH PRESSURE COMPENSATING RIGID FACE SEAL

Patent #:	4515228	Issue Dt:	05/07/1985	Application #:	06555735	Filing Dt:	11/28/1983
Title:	AIR GROOVE SCRAPER

Patent #:	4515228	Issue Dt:	05/07/1985	Application #:	06555735	Filing Dt:	11/28/1983
Title:	AIR GROOVE SCRAPER

Patent #:	4519719	Issue Dt:	05/28/1985	Application #:	06559651	Filing Dt:	12/09/1983
Title:	EARTH BORING BIT WITH PRESSURE COMPENSATING BEARING SEAL

Patent #:	4519719	Issue Dt:	05/28/1985	Application #:	06559651	Filing Dt:	12/09/1983
Title:	EARTH BORING BIT WITH PRESSURE COMPENSATING BEARING SEAL

Patent #:	4661932	Issue Dt:	04/28/1987	Application #:	06561487	Filing Dt:	12/14/1983
Title:	DYNAMIC DOWNHOLE RECORDER

Patent #:	4661932	Issue Dt:	04/28/1987	Application #:	06561487	Filing Dt:	12/14/1983
Title:	DYNAMIC DOWNHOLE RECORDER

Patent #:	4574895	Issue Dt:	03/11/1986	Application #:	06566962	Filing Dt:	12/29/1983
Title:	SOLID HEAD BIT WITH TUNGSTEN CARBIDE CENTRAL CORE

Patent #:	4574895	Issue Dt:	03/11/1986	Application #:	06566962	Filing Dt:	12/29/1983
Title:	SOLID HEAD BIT WITH TUNGSTEN CARBIDE CENTRAL CORE

Patent #:	4549820	Issue Dt:	10/29/1985	Application #:	06578318	Filing Dt:	02/13/1984
Title:	OPPOSED BUTTON THRUST SURFACES FOR EARTH BORING BITS

100

Patent #:	4549820	Issue Dt:	10/29/1985	Application #:	06578318	Filing Dt:	02/13/1984
Title:	OPPOSED BUTTON THRUST SURFACES FOR EARTH BORING BITS

Assignor

HUGHES TOOL COMPANY-USA, A CORP. OF DE

Exec Dt:

10/06/1988

Assignee

HUGHES TOOL COMPANY

Correspondence name and address
	FELSMAN, BRADLEY, GUNTER & DILLON
	2600 CONTINENTAL PLAZA
	777 MAIN STREET
	FORT WORTH, TX 76102

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