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Patent Assignment Details

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Reel/Frame:	004990/0770			Pages:	2
		Recorded:	11/21/1988
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST.

Total properties: 17

Patent #:	3791043	Issue Dt:	02/12/1974	Application #:	05151561	Filing Dt:	06/09/1974
Title:	INDICATING INSTRUMENTS

Patent #:	3862499	Issue Dt:	01/28/1975	Application #:	05331574	Filing Dt:	02/12/1973
Title:	WELL SURVEYING APPARATUS

Patent #:	3876867	Issue Dt:		Application #:	05344172	Filing Dt:
Title:

Patent #:	3888201	Issue Dt:		Application #:	05410713	Filing Dt:
Title:

Patent #:	4139950	Issue Dt:		Application #:	05736126	Filing Dt:
Title:

Patent #:	4153120	Issue Dt:		Application #:	05838653	Filing Dt:
Title:

Patent #:	4143721	Issue Dt:		Application #:	05838804	Filing Dt:
Title:

Patent #:	4157619	Issue Dt:		Application #:	05842041	Filing Dt:
Title:

Patent #:	4181014	Issue Dt:		Application #:	05902687	Filing Dt:
Title:

Patent #:	4178567	Issue Dt:		Application #:	05903011	Filing Dt:
Title:

Patent #:	4325438	Issue Dt:	04/20/1982	Application #:	06133319	Filing Dt:	03/24/1980
Title:	LENGTHENING DRILL STRING CONTAINING AN INSTRUMENT

Patent #:	4367797	Issue Dt:	01/11/1983	Application #:	06180808	Filing Dt:	08/25/1980
Title:	CABLE TRANSFER SUB FOR DRILL PIPE AND METHOD

Patent #:	4345454	Issue Dt:	08/24/1982	Application #:	06208236	Filing Dt:	11/19/1980
Title:	COMPENSATING WELL INSTRUMENT

Patent #:	4437243	Issue Dt:	03/20/1984	Application #:	06235931	Filing Dt:	02/20/1981
Title:	GYROSCOPIC INSTRUMENT

Patent #:	4462469	Issue Dt:	07/31/1984	Application #:	06284729	Filing Dt:	07/20/1981
Title:	FLUID MOTOR AND TELEMETRY SYSTEM

Patent #:	4440219	Issue Dt:	04/03/1984	Application #:	06457059	Filing Dt:	01/10/1983
Title:	THERMALLY ISOLATED WELL INSTRUMENTS

Patent #:	4649344	Issue Dt:	03/10/1987	Application #:	06606210	Filing Dt:	05/02/1984
Title:	TEST CIRCUIT FOR DETECTOR USED IN WELL BORE

Assignor

Exec Dt:

03/25/1986

Assignee

Correspondence name and address
	FINNEGAN, HENDERSON, FARABOW
	GARRETT & DUNNER
	1775 K STREET N.W.
	WASHINGTON, DC 20006-1502

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