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IN THE UNITED STATES DISTRICT COURT

FOR THE EASTERN DISTRICT OF TEXAS

MARSHALL DIVISION

HEADWATER RESEARCH LLC,

Plaintiff,

v.

T-MOBILE USA, INC. AND SPRINT CORP.,

Defendants.

Case No. 2:23-cv-00379-JRG-RSP

LEAD CASE

JURY TRIAL DEMANDED

HEADWATER RESEARCH LLC,

Plaintiff,

v.

T-MOBILE USA, INC. AND SPRINT CORP.,

Defendants.

Case No. 2:23-cv-00377-JRG-RSP

JURY TRIAL DEMANDED

JOINT CLAIM CONSTRUCTION AND PREHEARING STATEMENT

Pursuant to Local Patent Rule 4-3, and the Court’s Docket Control Order (Dkt. 63), 

Plaintiff Headwater Research, LLC (“Headwater”) and Defendants T-Mobile USA, Inc. and Sprint 

Corp. (collectively, “Defendants” or “T-Mobile”) (all together, the “parties”) respectfully submit

the following Joint Claim Construction and Prehearing Statement.

I. AGREED CLAIM CONSTRUCTIONS (P.R. 4-3(A)(1))

The parties have not identified any agreed claim constructions.

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II. DISPUTED CLAIM CONSTRUCTIONS (P.R. 4-3(A)(2))

The parties’ proposed constructions of disputed terms are provided in the chart below. The 

parties’ proposed constructions are also set forth in the accompanying Exhibit A, along with the 

intrinsic and extrinsic evidence on which the parties intend to rely.

A. U.S. Patent No. 8,589,541

Term 

No. Claim Term

Headwater’s 

Proposed 

Construction

T-Mobile’s

Proposed 

Construction

1 “one or more prospective ... 

communications [over a wireless 

network]” 

(claims 1-174)

Not indefinite; no 

construction 

necessary; plain and 

ordinary meaning.

Indefinite.

2 “service usage activity” 

(claims 1-174)

No construction 

necessary; plain and 

ordinary meaning.

“an activity by the 

first software 

component that 

requires usage of a 

wireless network 

connection”

3 “background activity” 

(claims 1-174)

Not indefinite; no 

construction 

necessary; plain and 

ordinary meaning.

Indefinite.

B. U.S. Patent No. 9,198,042

Term 

No. Claim Term

Headwater’s 

Proposed 

Construction

T-Mobile’s

Proposed 

Construction

4 “device service state”

(claims 1-18)

No construction 

necessary; plain and 

ordinary meaning.

“information about 

the current status of 

the device required 

to adequately define 

the actions needed 

from the service 

controller to 

maintain proper 

device-assisted 

Case 2:23-cv-00379-JRG-RSP Document 70 Filed 08/09/24 Page 2 of 7 PageID #: 2871
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service (DAS) 

system operation”

5 “service policy setting”

(claims 1-18)

“Policy setting for a 

network data service”

“rule for governing 

network service 

usage that can be 

implemented on the 

device”

6 “protected partition”

(claims 1-18)

No construction 

necessary; plain and 

ordinary meaning.

“a secure device 

assisted service 

execution 

environment”

C. U.S. Patent No. 9,215,613

Claim Term

Headwater’s 

Proposed 

Construction

T-Mobile’s 

Proposed 

Construction

7 “differential traffic control policy”

(claims 1-24)

No construction 

necessary; plain and 

ordinary meaning.

“rules for controlling 

network traffic that 

distinguishes 

between two or 

more things”

8 “classify whether a particular 

application capable of both 

interacting with the user in a user 

interface foreground of the device, 

and at least some Internet service 

activities when not interacting with 

the user in the device user interface 

foreground, is interacting with the 

user in the device user interface 

foreground”

(claims 1-24)

Not indefinite; no 

construction 

necessary; plain and 

ordinary meaning.

Indefinite.

9 “the user of the device is directly 

interacting with that application or 

perceiving any benefit from that 

application”

(claim 6)

Not indefinite; no 

construction 

necessary; plain and 

ordinary meaning.

Indefinite.

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III. ANTICIPATED LENGTH OF TIME NEEDED FOR THE CLAIM 

CONSTRUCTION HEARING (P.R. 4-3(A)(3))

The parties estimate that three hours will be needed for the claim construction hearing. The 

parties agree that each side will be allocated half of the total time permitted for the hearing.

IV. PROPOSED WITNESSES TO BE USED AT THE CLAIM CONSTRUCTION 

HEARING (P.R. 4-3(A)(4))

No party proposes to call witnesses at the claim construction hearing.

V. OTHER ISSUES TO BE ADDRESSED PRIOR TO CLAIM CONSTRUCTION 

HEARING (P.R. 4-3(A)(5))

The parties are not currently aware of any issues that they would propose taking up at a 

prehearing conference prior to the claim construction hearing.

Case 2:23-cv-00379-JRG-RSP Document 70 Filed 08/09/24 Page 4 of 7 PageID #: 2873
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Dated: August 9, 2024

/s/ Michelle Zhu

Katherine Q. Dominguez 

(NY Bar No. 4741237)

kdominguez@gibsondunn.com

Josh A. Krevitt 

(NY Bar No. 2568228)

jkrevitt@gibsondunn.com

Brian Rosenthal

(NY Bar No. 3961380)

brosenthal@gibsondunn.com

GIBSON, DUNN & CRUTCHER LLP

200 Park Avenue

New York, NY 10166-0193

Telephone: (212) 351-4000

Facsimile: (212) 351-4035

Robert Vincent

rvincent@gibsondunn.com

GIBSON, DUNN & CRUTCHER LLP

2001 Ross Avenue, Suite 2100

Dallas, Texas 75201-2923

Telephone: (214) 698-3100

Facsimile: (214) 571-2900

Andrew W. Robb 

(CA Bar No. 291438)

arobb@gibsondunn.com

GIBSON, DUNN & CRUTCHER LLP

310 University Ave

Palo Alto, CA 94301

Telephone: (650) 849-5300

Michelle Zhu

mzhu@gibsondunn.com

GIBSON, DUNN & CRUTCHER LLP

1050 Connecticut Avenue, N.W.

Washington, DC 20036

Telephone: (202) 777-9413

Melissa R. Smith

melissa@gillamsmithlaw.com

GILLIAM & SMITH, LLP

303 South Washington Avenue

/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

Jason M. Wietholter

CA State Bar No. 337139

Email: jwietholter@raklaw.com

Qi (Peter) Tong

TX State Bar No. 24119042 

Email: ptong@raklaw.com

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Marshall, TX 75670

Telephone: (903) 934-8450

Facsimile: (903) 934-9257

Attorneys for Defendants 

T-Mobile USA, Inc. and Sprint Corp.

RUSS AUGUST & KABAT

12424 Wilshire Blvd., 12th Floor

Los Angeles, CA 90025

Telephone: 310-826-7474

Andrea L. Fair

WARD, SMITH & HILL, PLLC 

1507 Bill Owens Parkway 

Longview, Texas 75604 

Telephone: 903-757-6400 

andrea@wsfirm.com

Attorneys for Plaintiff

Headwater Research 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 9th day of August 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

CERTIFICATE OF CONFERENCE

The undersigned certifies that counsel complied with the requirements of Eastern District 

of Texas Local Rule CV-7(h). The parties are in agreement on filing this Joint Motion.

/s/ Marc Fenster

Marc Fenster

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