Headwater Research LLC v. Cellco Partnership, d/b/a Verizon Wireless et al.

Headwater Research LLC, a non-practicing entity (NPE) or patent assertion entity (PAE) focused on mobile device and wireless connectivity technologies, initiated a patent infringement lawsuit against Cellco Partnership, doing business as Verizon Wireless, and Verizon Corporate Services Group Inc.. The defendants are operating companies, with Cellco Partnership being a major wireless telecommunications provider offering extensive wireless voice and data services and related equipment across the United States as a division of Verizon Communications Inc.. Verizon Corporate Services Group Inc. is also part of the Verizon corporate structure.

The litigation, filed in the Eastern District of Texas on July 11, 2025, alleged infringement of U.S. Patent No. 9,232,403, and at least one other patent (U.S. Patent No. 9,491,564 B1). Patent No. 9,232,403, titled "Intelligent mobile device data policy management," generally relates to systems and methods for managing data policies on mobile electronic devices, including handling network events and enforcing rules for network communication. The accused products were broadly defined as mobile electronic devices, including smartphones and tablets, which are fundamental to Verizon's consumer business model.

This case was procedurally situated in the Eastern District of Texas, a venue historically favored by patent plaintiffs due to its reputation for a fast-paced docket and plaintiff-friendly environment. However, this specific case saw a swift resolution, being dismissed without prejudice on September 26, 2025, just 77 days after filing, before any substantive motion practice or claim construction occurred. The dismissal without prejudice allows Headwater Research LLC to refile the claims in the future. Headwater Research is known for its aggressive assertion campaigns in the wireless sector, having previously secured significant verdicts, such as a $278.8 million award against Samsung in the EDTX, and settled cases against other major players like Apple, Google, and AT&T. The assertion of these patents has also led to validity challenges at the Patent Trial and Appeal Board (PTAB), as evidenced by IPR2026-00271 filed by Google against Headwater's '403 and '564 patents.

The patent infringement case, Headwater Research LLC v. Cellco Partnership, d/b/a Verizon Wireless et al., Case No. 2:25-cv-00709, was filed in the Eastern District of Texas and had a short duration, concluding with a voluntary dismissal.

Here's a chronological summary of the key legal developments and outcome:

• 2025-07-11: Complaint Filed
  Headwater Research LLC filed a patent infringement complaint against Cellco Partnership, d/b/a Verizon Wireless, and Verizon Corporate Services Group Inc., in the Eastern District of Texas. The sole patent asserted in the litigation was U.S. Patent No. 9,232,403.

• 2025-09-26: Voluntary Dismissal Without Prejudice
  The case was voluntarily dismissed without prejudice by the plaintiff, Headwater Research LLC. This dismissal occurred pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i), which allows a plaintiff to dismiss an action without a court order if done before the opposing party serves an answer or a motion for summary judgment. The swift resolution, occurring just 77 days after filing, indicates that the dismissal preceded any substantive defensive response from Verizon, such as an answer or significant pre-trial motions. No damages or injunctive relief were awarded or denied, and the dismissal without prejudice preserves Headwater Research's right to refile the same claims against Verizon or pursue the patent against other defendants.

Absence of Other Major Developments:
Due to the rapid voluntary dismissal, the litigation did not advance to later stages typically found in patent cases. There were no recorded pre-trial motions of substance (such as motions to dismiss for indefiniteness or invalidity, transfer, or stay pending IPR), claim construction (Markman) proceedings, discovery milestones, or trial events.

Parallel PTAB IPR/PGR Proceedings:
A search for Inter Partes Review (IPR) or Post-Grant Review (PGR) proceedings related to U.S. Patent No. 9,232,403 at the Patent Trial and Appeal Board (PTAB) does not reveal any instituted or completed IPR or PGR challenges. Therefore, no PTAB proceedings had an effect on this specific litigation.

Counsel of Record for Plaintiff Headwater Research LLC

Headwater Research LLC was represented by counsel from Russ August & Kabat LLP in this patent infringement case.

Here is a breakdown of the identified attorney:

• Marc A. Fenster
  • Role: Lead Counsel
  • Firm: Russ August & Kabat LLP, Los Angeles, CA.
  • Relevant Experience: Marc A. Fenster is an experienced patent litigation counsel. He is known for representing plaintiffs in significant intellectual property disputes. His firm, Russ August & Kabat LLP, has been involved in various high-profile patent cases. Further details on specific cases were not readily available in the provided search snippets, beyond the general mention of "experienced patent litigation counsel."

Defendant Representatives

Cellco Partnership, d/b/a Verizon Wireless, and Verizon Corporate Services Group Inc. were represented by counsel from The Dacus Firm PC in this patent infringement case.

Here is a breakdown of the identified attorney:

• Deron R. Dacus
  • Role: Counsel
  • Firm: The Dacus Firm PC, Tyler, TX.
  • Relevant Experience: Deron R. Dacus is an experienced patent litigation counsel with significant familiarity with the Eastern District of Texas. He has represented Verizon in other patent infringement cases in the Eastern District of Texas.