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Patent opinions from the Eastern District of Texas and the U.S. Court of Appeals for the Federal Circuit

Weekly Digest
E.D. Tex.

Headwater Research LLC v. AT&T Inc. et al, No. 2:23-cv-00397 (E.D. Tex. July 29, 2025)

Granted in Part
Daubert / Expert Challenges Motion to Strike
Court
U.S. District Court for the Eastern District of Texas, Marshall Division
Case No.
No. 2:23-cv-00397, Dkt. No. 262
Decided
July 29, 2025
Judge
Roy S. Payne, M.J. — Marshall
Document
Memorandum Order
Docket Entry
ORDER granting in part and denying in part 132 Sealed Motion
Length
1 page
Download Opinion (PDF)

IN THE UNITED STATES DISTRICT COURT

FOR THE EASTERN DISTRICT OF TEXAS

MARSHALL DIVISION

HEADWATER RESEARCH LLC, §

§ Plaintiff, § § v. § § CIVIL ACTION NO. 2:23-CV-397-JRG-RSP AT&T INC., AT&T SERVICES, INC., § (LEAD CASE)

AT&T MOBILITY, LLC, and AT&T § CORP., §

§

§

Defendants.

MEMORANDUM ORDER

Before the Court is the Daubert Motion and Motion to Strike Opinions of Erik de la Iglesia, . filed by the AT&T Defendants. Dkt. No. 132.

A substantively identical motion was filed in a parallel litigation: Headwater Research LLC v. Verizon Communications Inc., et al, 2:23-cv-00352-JRG-RSP. See Dkt. No. 184 in 2:23-cv-00352.

For the reasons discussed in the Court’s ruling on the parallel motion (Dkt. No. 350 in 2:23-cv-00352), the instant Motion is also GRANTED as to the sections of Mr. de la Iglesia’s report that rely on Dr. Wesel's carrier-specific appendices regarding each carrier's alleged knowledge of ItsOn, Headwater, and the asserted patents, and otherwise DENIED. SIGNED this 3rd day of January, 2012. SIGNED this 29th day of July, 2025.

ROY S. PAYNE

UNITED STATES MAGISTRATE JUDGE

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Cite this opinion

Headwater Research LLC v. AT&T Inc. et al, No. 2:23-cv-00397 (E.D. Tex. July 29, 2025).

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