IN THE UNITED STATES DISTRICT COURT

FOR THE EASTERN DISTRICT OF TEXAS

MARSHALL DIVISION

HEADWATER PARTNERS II LLC,

Plaintiff and Counterclaim-Defendant,

v.

T-MOBILE USA, INC. AND SPRINT LLC, 

Defendants and Counterclaimant-Plaintiffs.

Case No. 2:24-cv-00015-JRG-RSP

(LEAD CASE)

JURY TRIAL DEMANDED

HEADWATER PARTNERS II LLC,

Plaintiff and Counterclaim-Defendant,

v.

AT&T SERVICES, INC., AT&T MOBILITY, 

LLC AND AT&T CORP., 

Defendants and Counterclaimant-Plaintiffs.

Case No. 2:24-cv-00016-JRG-RSP

(MEMBER CASE)

JURY TRIAL DEMANDED

HEADWATER’S ANSWER TO T-MOBILE’S COUNTERCLAIMS

Plaintiff and Counterclaim-Defendant Headwater Partners II LLC (“Headwater”) hereby 

answers Defendants and Counterclaimant-Plaintiffs’ T-Mobile USA, Inc. and Sprint LLC

(collectively, “T-Mobile” or “Defendants and Counterclaim-Plaintiffs”), counterclaims as follows:

NATURE OF THE ACTION

1. Headwater admits that it has sued T-Mobile for infringement of the ’868 Patent, 

and ’502 Patent and that there is a substantial, actual, and continuing controversy between 

Headwater and T-Mobile as to the infringement of the asserted patents. Headwater denies the 

remaining allegations of paragraph 1. 

THE PARTIES

2. Admitted.

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3. Admitted that Headwater Partners II LLC is a Texas limited liability company with 

its headquarters at 110 North College Avenue, Suite 1116, Tyler, Texas 75702.

JURISDICTION AND VENUE

4. Admitted.

5. Admitted.

6. Admitted.

7. Admitted.

8. Headwater admits that it has sued T-Mobile for infringement of the ’868 Patent, 

and ’502 Patent and that there is a substantial, actual, and continuing controversy between 

Headwater and T-Mobile as to the infringement of the asserted patents. Headwater denies the 

remaining allegations of paragraph 8. 

FIRST COUNTERCLAIM – NON-INFRINGEMENT

9. Headwater incorporates the preceding paragraphs by reference, as though fully set 

forth herein.

10. Admitted.

11. Admitted.

12. Admitted.

13. Denied.

SECOND COUNTERCLAIM – INVALIDITY

14. Headwater incorporates the preceding paragraphs by reference, as though fully set 

forth herein.

15. Admitted.

16. Denied.

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17. Denied.

18. Denied.

PRAYER FOR RELIEF

In response to T-Mobile’s prayer for relief, Headwater denies that T-Mobile is entitled to 

any relief, including any of the relief requested in paragraphs 1–5 of T-Mobile’s prayer for relief. 

Further, Headwater requests the following relief:

WHEREFORE, Headwater respectfully requests that this Court enter:

a. A judgment in favor of Headwater that T-Mobile has infringed, either directly or 

indirectly, literally, under the doctrine of equivalents, or otherwise, the ’868 Patent and the ’502

Patent;

b. A permanent injunction prohibiting T-Mobile from further acts of infringement of

the ’868 Patent and the ’502 Patent;

c. A judgment and order requiring T-Mobile to pay Headwater its damages, enhanced 

damages, costs, expenses, and pre-judgment and post-judgment interest for T-Mobile’s

infringement of the ’868 Patent and the ’502 Patent;

d. A judgment and order requiring T-Mobile to provide accountings and to pay 

supplemental damages to Headwater, including without limitation, pre-judgment and postjudgment interest;

e. A judgment and order finding that this is an exceptional case within the meaning 

of 35 U.S.C. § 285 and awarding to Headwater its reasonable attorneys’ fees against T-Mobile; 

and

f. Any and all other relief as the Court may deem appropriate and just under the 

circumstances.

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JURY DEMAND

Headwater, under Rule 38 of the Federal Rules of Civil Procedure, requests a trial by jury 

of any issues so triable by right.

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Dated: April 8, 2024 Respectfully submitted,

/s/ Marc Fenster

Marc Fenster

CA State Bar No. 181067

Email: mfenster@raklaw.com

Reza Mirzaie

CA State Bar No. 246953

Email: rmirzaie@raklaw.com

Brian Ledahl

CA State Bar No. 186579

Email: bledahl@raklaw.com

Ben Wang

CA State Bar No. 228712

Email: bwang@raklaw.com

Adam Hoffman

CA State Bar No. 218740

Email: ahoffman@raklaw.com

Dale Chang

CA State Bar No. 248657

Email: dchang@raklaw.com 

Paul Kroeger

CA State Bar No. 229074

Email: pkroeger@raklaw.com

Neil A. Rubin

CA State Bar No. 250761

Email: nrubin@raklaw.com

Kristopher Davis

CA State Bar No. 329627

Email: kdavis@raklaw.com

James S. Tsuei

CA State Bar No. 285530

Email: jtsuei@raklaw.com

Philip Wang

CA State Bar No. 262239

Email: pwang@raklaw.com

Amy Hayden

CA State Bar No. 287026

Email: ahayden@raklaw.com

James Milkey

CA State Bar No. 281283

Email: jmilkey@raklaw.com

Qi Peter Tong

TX State Bar No. 24119042

Email: ptong@raklaw.com

James Pickens

Case 2:24-cv-00015-JRG-RSP Document 40 Filed 04/08/24 Page 5 of 7 PageID #: 335
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CA State Bar No. 307474

Email: jpickens@raklaw.com

Jason M. Wietholter

CA State Bar No. 337139

Email: jwietholter@raklaw.com

RUSS AUGUST & KABAT

12424 Wilshire Blvd. 12th Floor

Los Angeles, CA 90025

Telephone: 310-826-7474

ATTORNEYS FOR PLAINTIFF AND 

COUNTERCLAIM-DEFENDANT,

Headwater Partners II LLC

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CERTIFICATE OF SERVICE

I hereby certify that all counsel of record who are deemed to have consented to electronic 

service are being served this 8th day of April 2024 with a copy of this document via the Court’s 

CM/ECF system per Local Rule CV-5(a)(3).

/s/ Marc Fenster

Marc Fenster

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