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Patent Assignment Assignor Details

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Assignor Name : CELLNET DATA SYSTEMS, INC.

Total Assignments: 4

Assignment: 1

Reel/Frame:	010226/0840			Pages:	22
		Recorded:	11/12/1999
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

CELLNET DATA SYSTEMS, INC.

Exec Dt:

11/09/1999

Assignee

PRICEWATERHOUSECOOPERS LLP

ONE POST OFFICE SQUARE

BOSTON, MASSACHUSETTS 02109

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4792677	NONE		06902161	4783623	NONE		06902199	D310973	NONE		06903068
5014213	NONE		07183826	D320362	NONE		07184044	5377232	NONE		07818693
5604768	NONE		08361799	5661750	NONE		08473011	6195018	NONE		08597724
6741638	US20010038662		08880470	6456644	NONE		08880578	6047016	NONE		08880634
6628699	US20010050948		08880637	6263009	NONE		08881549	6304227	NONE		08929161
6100816	NONE		09008273	6288685	NONE		09150495	6380851	NONE		09310457
6181258	NONE		09312928	6677862	NONE		09313050	6452986	NONE		09313125
6477558	NONE		09313128	6178197	NONE		09365108	6373442	NONE		09378539

Correspondence name and address
	HALE AND DORR LLP
	JAMES B. LAMPERT, ESQ.
	60 STATE STREET
	BOSTON, MA 02109

Assignment: 2

Reel/Frame:	011245/0878			Pages:	20
		Recorded:	11/13/2000
Conveyance:	ACQUISITION

Assignor

CELLNET DATA SYSTEMS, INC.

Exec Dt:

03/01/2000

Assignee

SCHLUMBERGER RESOURCE MANAGEMENT SERVICES, INC.

5430 METRIC PLACE

NORCROSS, GEORGIA 30092

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4792677	NONE		06902161	4783623	NONE		06902199	D310973	NONE		06903068
5014213	NONE		07183826	D320362	NONE		07184044	5377232	NONE		07818693
5604768	NONE		08361799	5661750	NONE		08473011	6195018	NONE		08597724
6741638	US20010038662		08880470	6456644	NONE		08880578	6047016	NONE		08880634
6628699	US20010050948		08880637	6263009	NONE		08881549	6304227	NONE		08929161
6100816	NONE		09008273	6288685	NONE		09150495	6380851	NONE		09310457
6181258	NONE		09312928	6677862	NONE		09313050	6452986	NONE		09313125
6477558	NONE		09313128	6163276	NONE		09313132	6178197	NONE		09365108
6373442	NONE		09378539	6492910	NONE		09564223

Correspondence name and address
	SCHLUMBERGER RESOURCE MANAGEMENT
	SERVICES, INC.
	LEONARD W. POJUNAS
	5430 METRIC PLACE
	NORCROSS, GA 30092

Assignment: 3

Reel/Frame:	010871/0652			Pages:	13
		Recorded:	05/25/2000
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

CELLNET DATA SYSTEMS, INC.

Exec Dt:

05/16/2000

Assignee

SCHLUMBERGER RESOURCE MANAGEMENT SYSTEMS, INC.

5430 METRIC PLACE

NORCROSS, GEORGIA 30092

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4119948	NONE		05681502	4132981	NONE		05734678	4120031	NONE		05810675
4298839	NONE		05891997	4315248	NONE		06123217	4415853	NONE		06199386
4463354	NONE		06328950	4516213	NONE		06344500	4584527	NONE		06479065
4556844	NONE		06547884	4638314	NONE		06570118	4465970	NONE		06578315
4792677	NONE		06902161	4783623	NONE		06902199	D310973	NONE		06903068
5014213	NONE		07183826	D320362	NONE		07184044	5377232	NONE		07818693
5604788	NONE		08405528	5661750	NONE		08473011	6195018	NONE		08597724
6741638	US20010038662		08880470	6047016	NONE		08880634	6628699	US20010050948		08880637
6263009	NONE		08881549	6304227	NONE		08929161	6100816	NONE		09008273
6288685	NONE		09150495	6380851	NONE		09310457	6181258	NONE		09312928
6677862	NONE		09313050	6452986	NONE		09313125	6477558	NONE		09313128
6163276	NONE		09313132	6178197	NONE		09365108	6373442	NONE		09378539
3683343	NONE		UNAVAILABLE	4179654	NONE		UNAVAILABLE	3820073	NONE		UNAVAILABLE
4050020	NONE		UNAVAILABLE	4166975	NONE		UNAVAILABLE

Correspondence name and address
	SHEARMAN & STERLING
	ALEXANDER M. KIM
	599 LEXINGTON AVENUE
	NEW YORK, NEW YORK 10022

Assignment: 4

Reel/Frame:	015044/0904			Pages:	16
		Recorded:	08/06/2004
Conveyance:	CORRECTIVE ASSIGNMENT TO CORRECT ASSIGNEE NAME ON DOCUMENT PREVIOUSLY RECORDED AT REEL 010871,FRAME 0652

Assignor

CELLNET DATA SYSTEMS, INC.

Exec Dt:

05/16/2000

Assignee

SCHLUMBERGER RESOURCE MANAGEMENT SERVICES, INC.

5430 METRIC PLACE

NORCROSS, GEORGIA 30092

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
4119948	NONE		05681502	4132981	NONE		05734678	4120031	NONE		05810675
4298839	NONE		05891997	4315248	NONE		06123217	4415853	NONE		06199386
4463354	NONE		06328950	4516213	NONE		06344500	4584527	NONE		06479065
4556844	NONE		06547884	4638314	NONE		06570118	4465970	NONE		06578315
4792677	NONE		06902161	4783623	NONE		06902199	D310973	NONE		06903068
5014213	NONE		07183826	D320362	NONE		07184044	5377232	NONE		07818693
5604788	NONE		08405528	5661750	NONE		08473011	6195018	NONE		08597724
6741638	US20010038662		08880470	6047016	NONE		08880634	6047016	NONE		08880634
6628699	US20010050948		08880637	6263009	NONE		08881549	6304227	NONE		08929161
6100816	NONE		09008273	6288685	NONE		09150495	6380851	NONE		09310457
6181258	NONE		09312928	6677862	NONE		09313050	6452986	NONE		09313125
6477558	NONE		09313128	6163276	NONE		09313132	6178197	NONE		09365108
6373442	NONE		09378539	3683343	NONE		UNAVAILABLE	4050020	NONE		UNAVAILABLE
4179654	NONE		UNAVAILABLE	4166975	NONE		UNAVAILABLE	3820073	NONE		UNAVAILABLE

Correspondence name and address
	KIRKLAND & ELLIS LLP
	KRISTA L. NUNEMAKER
	200 E. RANDOLPH DRIVE
	CHICAGO,IL 60601

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