2:23-cv-00103
E.D. Tex.
Apr 17, 2025

HEADWATER RESEARCH LLC, Plaintiff, v. SAMSUNG ELECTRONICS CO., LTD. and SAMSUNG ELECTRONICS AMERICA, INC., Defendants.

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

UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF TEXAS MARSHALL DIVISION

April 17, 2025

JURY TRIAL DEMANDED

DEFENDANTS’ NOTICE OF FINAL INVALIDITY THEORIES AND EQUITABLE DEFENSES

Pursuant to the Court‘s April 11, 2025 email correspondence, Defendants Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc. (“Samsung“) hereby give notice of their final invalidity theories, final prior art references/combinations, and final equitable defenses for the jury trial scheduled to begin on April 21, 2025.

Samsung reserves the right to discuss additional prior art references, including but not limited to with respect to discussing the background state of the relevant art, motivation to combine references for 35 U.S.C. § 103 obviousness theories, non-infringing alternatives, and the lack of technical benefits attributable to the asserted patents over the prior art. Samsung also reserves the right to rely upon any closely related references, including literature that demonstrates the operation and public availability of system prior art.

Samsung intends to present the following invalidity theories and prior art references/combinations at the jury trial scheduled for April 21, 2025:

  • U.S. Patent No. 8,406,733, Claims 1, 7, and 19
    1. The GTalkServices system renders claims 1, 7, and 19 anticipated and/or obvious under 35 U.S.C. §§ 102, 103.
    2. The GTalkServices system renders claims 1, 7, and 19 obvious under 35 U.S.C. § 103 in view of Wireless Access Protocol (WAP).
    3. Claims 1, 7, and 19 are invalid for lack of written description under 35 U.S.C. § 112.
  • U.S. Patent No. 9,198,117, Claims 1, 12, and 161
    1. The GTalkServices system renders claims 1, 12, and 16 anticipated and/or obvious under 35 U.S.C. §§ 102, 103.
    2. The GTalkServices system renders claims 1, 12, and 16 obvious under 35 U.S.C. § 103 in view of Wireless Access Protocol (WAP).
    3. The GTalkServices system renders claims 1, 12, and 16 obvious under 35 U.S.C. § 103 in view of Kalibjian.
    4. Claims 1, 12, and 16 are invalid for lack of written description under 35 U.S.C. § 112.

Samsung makes this disclosure based on its current knowledge and understanding of the asserted claims, Headwater‘s infringement contentions and expert reports, the parties’ exhibit lists and other facts and information available as of today‘s date. Although the list above reflects Samsung‘s invalidity theories at trial, Samsung reserves the right to present arguments and evidence related to additional prior art in the context of rebutting Headwater‘s theories on the alleged benefits of the patents, consistent with the opinions set forth in Dr. Foster‘s expert report—and dependent upon the arguments Mr. de la Iglesia makes during his direct examination.

Dated: April 17, 2025

Respectfully submitted,

By: /s/ Jonathan B. Bright

Ruffin B. Cordell
TX Bar No. 04820550
Michael J. McKeon
DC Bar No. 459780
mckeon@fr.com
Jared Hartzman
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
Christopher O. Green
GA Bar No. 037617
cgreen@fr.com
Noah C. Graubart
GA Bar No. 141862
graubart@fr.com
Sara C. Fish
GA Bar No. 873853
sfish@fr.com
Katherine H. Reardon
NY Bar No. 5196910
reardon@fr.com
Steffen C. Lake
GA Bar No. 512272
lake@fr.com

Nicholas A. Gallo
GA Bar No. 546590
gallo@fr.com
Vivian C. Keller (pro hac vice)
GA Bar No. 651500
keller@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
ldavis@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)
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
Meghana Thadani
NY Bar No. 5851902
thadani@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

Andrew Thompson (“Tom“) Gorham
State Bar No. 24012715
tom@gillamsmithlaw.com
James Travis Underwood
Texas Bar No. 24102587
travis@gillamsmithlaw.com
GILLAM & SMITH, LLP
102 N. College, Suite 800
Tyler, Texas 75702
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
Telephone: (903) 597-8311
Facsimile: (903) 593-0846

Lance Lin Yang

CA. Bar No. 260705
Lanceyang@quinnemanuel.com
Kevin (Gyushik) Jang
CA Bar No. 337747
kevinjang@quinnemanuel.com
Sean S. Pak
CA Bar No. 219032
seanpak@quinnemanuel.com
QUINN EMANUEL URQUHART & SULLIVAN, LLP
50 California Street, 22nd Floor
San Francisco, CA 94111
Telephone: (415) 875-6600
Brady Huynh (admitted pro hac vice)
CA Bar No. 339441
bradyhuynh@quinnemanuel.com
QUINN EMANUEL URQUHART & SULLIVAN, LLP
555 Twin Dolphin Drive, 5th Floor
Redwood Shores, CA 94065
Telephone: (650) 801-5000
Facsimile: (650) 801-5100

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.

CERTIFICATE OF SERVICE

I certify that on April 17, 2025 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/ Jonathan B. Bright
Jonathan B. Bright

Notes

1
Samsung intends to present also that these theories render claim 2 invalid from which claim 16 depends.
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