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

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E.D. Tex.

Headwater Research LLC v. T-Mobile US, Inc. et al, No. 2:23-cv-00379 (E.D. Tex. June 30, 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-00379, Dkt. No. 322
Decided
June 30, 2025
Judge
Roy S. Payne, M.J. — Marshall
Document
Memorandum Order
Docket Entry
ORDER granting in part and denying in part 180 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-379-JRG-RSP §

T-MOBILE USA, INC. and SPRINT

(LEAD CASE)

§

CORP.,

§

§ Defendants. §

MEMORANDUM ORDER

Before the Court is the Daubert Motion and Motion to Strike Secondary Considerations Opinions of Erik de la Iglesia, filed by Defendants T-Mobile USA, Inc. and Sprint Corp.. Dkt. No. . 180.

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 30th day of June, 2025.

ROY S. PAYNE

UNITED STATES MAGISTRATE JUDGE

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Cite this opinion

Headwater Research LLC v. T-Mobile US, Inc. et al, No. 2:23-cv-00379 (E.D. Tex. June 30, 2025).

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