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Patent Assignment Assignor Details

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Assignor Name : FIRST CITY NATIONAL BANK OF HOUSTON

Total Assignments: 3

Assignment: 1

Reel/Frame:	003897/0788			Pages:	4
		Recorded:	08/17/1981
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

FIRST CITY NATIONAL BANK OF HOUSTON

Exec Dt:

06/18/1981

Assignee

FIRST INTERNATIONAL BANK IN HOUSTON, N. A.

TEXAS

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
3212578	NONE		04187059	3144085	NONE		04350764	3653254	NONE		05081304
3706215	NONE		05116767	3871209	NONE		05127949	3795138	NONE		05127953
3710628	NONE		05146637	3812700	NONE		05325686	4132111	NONE		05506547
3971442	NONE		05538748	4014062	NONE		05538867	4011617	NONE		05593525
4010633	NONE		05632790	4152926	NONE		05849309	4136552	NONE		05873003
4246809	NONE		06082873	4254655	NONE		06082978	4296842	NONE		06083162
4294444	NONE		06145367

Correspondence name and address
	MARTIN P. HOFFMAN
	522 HAYES BLDG.,
	2361 JEFFERSON DAVIS HWY.
	ARLINGTON, VA 22202

Assignment: 2

Reel/Frame:	004655/0314			Pages:	3
		Recorded:	01/15/1987
Conveyance:	RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).

Assignor

FIRST CITY NATIONAL BANK OF HOUSTON

Exec Dt:

12/31/1986

Assignee

WEATHERFORD U.S., INC.

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4305895	NONE		06147061	4369049	NONE		06338515	4474500	NONE		06418570
4511374	NONE		06581341	4615673	NONE		06625023	4588424	NONE		06661398
4597733	NONE		06701753	4579565	NONE		06732379	4617030	NONE		06821026
4676806	NONE		06835279	4689053	NONE		06835516	4579565	NONE		06866765

Correspondence name and address
	FULBRIGHT & JAWORSKI
	1301 MCKINNEY WEST
	HOUSTON, TEXAS 77010

Assignment: 3

Reel/Frame:	004750/0704			Pages:	1
		Recorded:	07/27/1987
Conveyance:	RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).

Assignor

FIRST CITY NATIONAL BANK OF HOUSTON

Exec Dt:

12/31/1986

Assignee

WEATHERFORD U.S., INC.

NOT PROVIDED

Property

Pat #

Pub #

Intl #

App #

4474550

NONE

06359246

Correspondence name and address
	FULBRIGHT & JAWORSKI
	1301 MCKINNEY ST.
	HOUSTON, TX 77010

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