1

UNITED STATES DISTRICT COURT

FOR THE EASTERN DISTRICT OF TEXAS

MARSHALL DIVISION

HEADWATER RESEARCH LLC,

Plaintiff,

v.

SAMSUNG ELECTRONICS CO., LTD. and 

SAMSUNG ELECTRONICS AMERICA,

INC.,

Defendants.

Case No. 2:23-cv-00103-JRG-RSP

JURY TRIAL DEMANDED

JOINT NOTICE AND STIPULATION REGARDING CASE NARROWING

Plaintiff Headwater Research LLC (“Headwater”) and Defendants Samsung Electronics 

Co., Ltd. and Samsung Electronics America, Inc. (collectively, “Samsung”) file this Joint Notice 

and Stipulation Regarding Case Narrowing and stipulate as follows: 

1. Headwater withdraws the following claims asserted against Samsung in 

Headwater’s First Amended Complaint for Patent Infringement (Dkt. 31):

• Infringement under the Doctrine of Equivalents1; and

• Pre-suit Willful Infringement.

2. Samsung withdraws the following affirmative defenses asserted in Samsung’s 

Answer and Defenses to Headwater’s First Amended Complaint for Patent Infringement (Dkt. 85):

• Third Affirmative Defense (Laches, Equitable Estoppel, Waiver, and/or Unclean 

Hands);

1 Headwater’s infringement expert report does not contain opinions under the doctrine of 

equivalents (“DOE”) and, on that basis, DOE is not at issue.

Case 2:23-cv-00103-JRG-RSP Document 190 Filed 11/01/24 Page 1 of 6 PageID #: 12203
2

• Fourth Affirmative Defense (Prosecution History Estoppel2 and/or Disclaimer);

• Fifth Affirmative Defense as to Marking3;

• Sixth Affirmative Defense (Covenant Not to Sue, License, and/or Estoppel);

• Seventh Affirmative Defense (Failure to State a Claim)4; and

• Eight Affirmative Defense (Inequitable Conduct / Infectious Unenforceability).

Dated: November 1, 2024 Respectfully submitted,

By: /s/ Marc Fenster By: /s/ Katherine D. Prescott

Marc Fenster

CA State Bar No. 181067

Reza Mirzaie

CA State Bar No. 246953

Brian Ledahl

CA State Bar No. 186579

Ben Wang

CA State Bar No. 228712

Adam Hoffman

CA State Bar No. 218740

Paul Kroeger

CA State Bar No. 229074

Neil A. Rubin

CA State Bar No. 250761

Kristopher Davis

CA State Bar No. 329627

James S. Tsuei

CA State Bar No. 285530

Philip Wang

CA State Bar No. 262239

Amy Hayden

CA State Bar No. 287026

Dale Chang

CA State Bar No. 248657

Ruffin B. Cordell

TX Bar No. 04820550

Michael J. McKeon

DC Bar No. 459780

mckeon@fr.com

Jared Hartzman (pro hac vice forthcoming)

DC Bar No. 1034255

hartzman@fr.com

FISH & RICHARDSON P.C.

1000 Maine Avenue, SW, Ste 1000

Washington, D.C. 20024

Telephone: (202) 783-5070

Facsimile: (202) 783-2331

Thad C. Kodish

GA Bar No. 427603

tkodish@fr.com

Benjamin K. Thompson

GA Bar No. 633211 

bthompson@fr.com

Jonathan B. Bright

GA Bar No. 256953 

jbright@fr.com

Nicholas A. Gallo 

2 Samsung withdraws its defense of prosecution history estoppel based on Headwater’s 

withdrawal of any claim of infringement based on DOE.

3 Samsung withdraws its marking defense but reserves all other rights with respect to its Fifth 

Affirmative Defense entitled “Notice, Damages, Marking, and Costs.”

4 Samsung will be moving to dismiss based on standing and is not waiving that defense.

Case 2:23-cv-00103-JRG-RSP Document 190 Filed 11/01/24 Page 2 of 6 PageID #: 12204
3

James Milkey

CA State Bar No. 281283

Jason M. Wietholter

CA State Bar No. 337139

James Pickens

CA State Bar No. 307474

Qi (Peter) Tong

TX State Bar No. 24119042

RUSS AUGUST & KABAT

12424 Wilshire Blvd. 12th Floor

Los Angeles, CA 90025

Telephone: 310-826-7474

rak_headwater@raklaw.com

Andrea L. Fair

TX State Bar No. 24078488

MILLER FAIR HENRY PLLC

1507 Bill Owens Parkway 

Longview, Texas 75604 

Telephone: 903-757-6400 

andrea@millerfairhenry.com

Attorneys for Plaintiff,

Headwater Research LLC

GA Bar No. 546590

gallo@fr.com

Steffen Lake (pro hac vice forthcoming)

GA Bar No. 512272

lake@fr.com

Vivian C. Keller (admitted pro hac vice)

GA Bar No. 651500

keller@fr.com

Noah C. Graubart

GA Bar No. 141862

graubart@fr.com

Sara C. Fish

GA Bar No. 873853

sfish@fr.com

FISH & RICHARDSON P.C.

1180 Peachtree St. NE, Fl. 21

Atlanta, GA 30309

Telephone: (404) 892-5005

Facsimile: (404) 892-5002

Leonard E. Davis

TX Bar No. 05521600

ldavid@fr.com

Andria Rae Crisler

TX Bar No. 24093792

crisler@fr.com

Thomas H. Reger II

Texas Bar No. 24032992

reger@fr.com

FISH & RICHARDSON P.C.

1717 Main Street, Suite 5000

Dallas, TX 75201

Telephone: (214)747-5070

Facsimile: (214) 747-2091

John-Paul R. Fryckman (pro hac vice)

CA Bar No. 317591

John W. Thornburgh

CA Bar No. 154627

thornburgh@fr.com

FISH & RICHARDSON P.C.

12860 El Camino Real, Ste. 400

San Diego, CA 92130

Telephone: (858) 678-5070

Facsimile: (858) 678-5099

Katherine D. Prescott (pro hac vice)

Case 2:23-cv-00103-JRG-RSP Document 190 Filed 11/01/24 Page 3 of 6 PageID #: 12205
4

CA Bar No. 215496

prescott@fr.com

FISH & RICHARDSON P.C.

500 Arguello Street

Suite 400

Redwood City, CA 94063

Telephone: (650) 839-5180

Facsimile: (650) 839-5071

Kyle J. Fleming (pro hac vice)

NY Bar No. 5855499

kfleming@fr.com

FISH & RICHARDSON P.C.

7 Times Square, 20th Floor,

New York, NY 10036

Telephone: (212) 765-5070

Facsimile: (212) 258-2291

Melissa R. Smith

State Bar No. 24001351

Melissa@gillamsmithlaw.com 

GILLAM & SMITH, LLP

303 South Washington Avenue

Marshall, Texas 75670

Telephone: (903) 934-8450

Facsimile: (903) 934-9257

Michael E. Jones 

State Bar No. 10929400 

mikejones@potterminton.com 

Shaun W. Hassett 

State Bar No. 24074372 

shaunhassett@potterminton.com

POTTER MINTON, P.C.

102 N. College Ave., Suite 900 

Tyler, Texas 75702 

Tel: (903) 597-8311

Fax: (903) 593-0846 

Lance Lin Yang

QUINN EMANUEL URQUHART & SULLIVAN,

LLP - LA

865 S. Figueroa Street, 10th Floor

Los Angeles, CA 90017 USA

213/443-3000 Fax: 213/443-3100

Lanceyang@quinnemanuel.Com

Case 2:23-cv-00103-JRG-RSP Document 190 Filed 11/01/24 Page 4 of 6 PageID #: 12206
5

Jon Bentley Hyland 

Texas Bar No. 24046131

jhyland@hilgersgraben.com

Grant K. Schmidt

Texas Bar No. 24084579

gschmidt@hilgersgraben.com

HILGERS GRABEN PLLC

7859 Walnut Hill Lane, Suite 335

Dallas, Texas 75230

Telephone: (972) 645-3097

Attorneys for Defendants,

Samsung Electronics Co., Ltd. and 

Samsung Electronics America, Inc.

Case 2:23-cv-00103-JRG-RSP Document 190 Filed 11/01/24 Page 5 of 6 PageID #: 12207
CERTIFICATE OF CONFERENCE

Counsel for Plaintiff and counsel for Defendants have complied with the meet and confer

requirements of Local Rule CV-7(h). The parties agree in the filing of this Joint Notice and 

Stipulation Regarding Case Narrowing.

/s/ Marc Fenster

Marc Fenster

CERTIFICATE OF SERVICE

I certify that on November 1, 2024 counsel of record who are deemed to have consented to 

electronic service are being served with a copy of this document via the Court’s CM/ECF system.

/s/ Marc Fenster

Marc Fenster

Case 2:23-cv-00103-JRG-RSP Document 190 Filed 11/01/24 Page 6 of 6 PageID #: 12208