EXHIBIT 3 

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Fish & Richardson P.C.

1000 Maine Avenue, S.W.

Suite 1000

Washington, DC 20024

202 783 5070 main

202 783 2331 fax

Thad Kodish

Principal

tkodish@fr.com

+1 404-724-2792 direct

July 1, 2024

VIA E-MAIL

Russ August & Kabat 

12424 Wilshire Boulevard

12th Floor

Los Angeles, CA 90025

Phone: 310-826-7474

Parker Bunt & Ainsworth

100 E Ferguson

Suite 418

Tyler, TX 75702

Phone: 903-531-3535

Re: Headwater Research LLC v. Samsung Electronics Co., Ltd. et al., Case No. 2:23-cv00103 (E.D. Tex.)

Dear Counsel:

Samsung Electronics Co., Ltd. (“Samsung”) has filed petition for inter partes review (IPR) 

petition (IPR2024-00341) with the Patent Trial and Appeal Board (PTAB) to address the validity 

of claims 1-17, 19, 21-27, 29, and 30 of U.S. Patent No. 8,406,733 (“the ’733 Patent”). The 

tables in attached Appendix A list all grounds, challenged claims, and references asserted in 

IPR2024-00341. 

I write to inform you that Samsung hereby stipulates that, if the PTAB institutes IPR2024-00341, 

Samsung agrees not to pursue any grounds raised in the IPR, any grounds raised within

Samsung’s invalidity contentions that were raised or could have been raised in the IPR, or any

grounds Samsung could have reasonably raised before the PTAB, in this district court litigation,

or any parallel proceeding. Sotera Wireless, Inc. v. Masimo Corp., Case IPR2020-01019, Paper

12 (PTAB Dec. 1, 2020). Samsung reserves the right to assert in the District Court proceedings

prior art that is not eligible for PTAB consideration, e.g., the system art noted in Appendix B

below and the system art identified in Samsung’s invalidity contentions.1 Samsung’s reservation

is consistent with a Sotera stipulation because the grounds listed in Appendix B are based on

prior art that is ineligible for consideration before the PTAB, and that could not have been raised

before the PTAB.

1 Samsung notes that discovery in the District Court proceedings is currently ongoing and

Samsung expects Google, Apple, Blackberry, OpenWave, Nokia, and Microsoft to produce

additional materials and/or testimony relating to the system art listed in Appendix B below. For

the avoidance of doubt, Samsung reserves the right to rely on such forthcoming productions in

the District Court proceedings.

SAMSUNG 1044 

SAMSUNG V. HEADWATER 

IPR2024-00341

1

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For the sake of clarity and to avoid any doubt, if the PTAB declines to institute IPR2024-00341,

Samsung reserves the right to assert any grounds of invalidity in the District Court proceedings

against the ’733 Patent. 

Sincerely,

Thad Kodish

Attorney for Samsung Electronics Co., Ltd.

2

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Appendix A – Grounds and Prior Art References Used in IPR2024-00341

Ground Claim(s) 35 U.S.C. §103

1 1-17, 19, 21-27, 29, 30 TS-23.140 and Ogawa

List of References

Reference Name Details

TS-23.140 3GPP TS 23.140 v6.9.0 (2005-03); 3rd Generation Partnership Project; 

Technical Specification Group Terminals; Multimedia Messaging 

Service (MMS); Functional Description; Stage 2

Ogawa U.S. Pat. No. 8,195,961B2

3

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Appendix B – System Art

Devices and/or Servers supporting Amp’d Mobile system

Devices and/or Servers supporting Apple Push Notifications and/or the App Store

Devices and/or Servers supporting BlackBerry Mobile Data Service, App World, and/or other 

push services

Devices and/or Servers supporting D-BUS communication service

Android Devices and/or Servers supporting Google Messaging Delivery

Devices and/or Servers supporting MMS technology

Windows Mobile Devices and/or Servers supporting ActiveSync and/or Microsoft Direct Push 

technology

Devices and/or Servers supporting OpenWave push technology, including OpenWave Mobile

Access Gateway

Devices and/or Servers supporting Nokia push technology

Devices and/or Servers supporting ProcessOne Push Platform

Devices and/or Servers supporting Wireless Access Protocol

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