WSOU Investments v. ZTE Corp. — Dismissed with Prejudice After 667 Days
WSOU Investments LLC, operating as Brazos Licensing and Development, sued ZTE Corporation for infringement of US7477876B2, covering variable rate channel quality feedback in wireless systems. Filed in the Western District of Texas in February 2022, the case was dismissed with prejudice by stipulation of both parties after 667 days of litigation, with each side bearing its own costs.
Brazos Licensing targets ZTE over wireless CQI patent in W.D. Texas
WSOU Investments LLC, doing business as Brazos Licensing and Development, filed suit against ZTE Corporation on 8 February 2022 in the Western District of Texas (Case No. 6:22-cv-00138). The action asserted infringement of US7477876B2, a patent directed to variable rate channel quality feedback (CQI) in wireless communication systems — a technology layer critical to modern cellular network performance. WSOU/Brazos is a patent assertion entity with a substantial portfolio of former Nokia-derived wireless patents.
The case closed on 7 December 2023 via a joint stipulation filed under Federal Rule of Civil Procedure 41(a)(1)(A)(ii), pursuant to which both parties agreed to dismiss all claims with prejudice. The recorded basis of termination is 'Dismissed with Prejudice.' The stipulation further provides that each party shall bear its own costs, expenses, and attorneys' fees, meaning no cost order was entered against either side. The specific commercial terms underlying the resolution, if any, are not disclosed in the available public record.
The 667-day duration — just under two years — suggests the matter progressed through substantive litigation phases before the parties reached agreement to resolve it on these terms. What drove the parties to a mutual, prejudice-bearing dismissal rather than a litigated outcome or formally recorded settlement is not apparent from the public docket. The absence of a fee award to either party is consistent with a negotiated exit, though the underlying reasons remain undisclosed.
See Complete Case & Patent Analysis →Filing to Dismissed with Prejudice in 667 days
667 days from filing to dismissal — roughly 22 months of active litigation in W.D. Texas
US7477876B2 — Variable Rate Channel Quality Feedback, Wireless Systems
Yes — if your products or components implement variable rate channel quality feedback, dynamic CQI reporting, or link-adaptation scheduling in 3G, 4G, or legacy wireless systems, US7477876B2 is directly relevant to your FTO exposure. This patent survived litigation against ZTE without any validity challenge being publicly adjudicated, meaning it enters any future dispute with its presumption of validity intact. R&D and product teams developing wireless modems, base station schedulers, or UE firmware should not assume the ZTE dismissal offers them any protection.
Official order — verbatim text
The stipulation invokes Rule 41(a)(1)(A)(ii), requiring agreement of all parties who have appeared — reflecting a bilateral decision to end the litigation permanently. The with-prejudice designation forecloses any future suit by WSOU/Brazos against ZTE on the same claims, while leaving the patent enforceable against the broader market. The mutual cost-bearing clause means neither party obtained a fee award, and no further terms are disclosed in the available public record.
Dismissed with prejudice: what the stipulated exit means for both parties
Rule 41(a)(1)(A)(ii) stipulated dismissal with prejudice
A dismissal with prejudice under Rule 41(a)(1)(A)(ii) is filed by joint stipulation of all appearing parties — no court order is required. 'With prejudice' is the critical qualifier: it operates as a final adjudication on the merits, permanently barring WSOU/Brazos from re-filing the same claims against ZTE on US7477876B2. The court retains no further jurisdiction unless expressly reserved.
Permanent bar on re-filingBrazos forfeits the right to re-assert US7477876B2 against ZTE
By agreeing to dismissal with prejudice, WSOU/Brazos permanently relinquishes any future infringement claims against ZTE based on US7477876B2 in this action. The patent itself remains in force and can still be asserted against other parties, but ZTE is effectively immunised from further suit on these specific claims. Whether any value was exchanged as part of this resolution is not disclosed in the public record.
Patent survives; ZTE claim extinguishedZTE secures finality — no damages, no injunction, own costs
ZTE exits the litigation without any recorded damages award, injunction, or adverse cost order. The stipulation expressly provides that each party bears its own attorneys' fees and expenses, so ZTE receives no fee reimbursement either. The with-prejudice bar prevents Brazos from reviving these specific patent claims against ZTE in future proceedings, providing ZTE with a degree of commercial certainty regarding US7477876B2.
Clean exit, no liability recordedCQI patent remains a live threat for other wireless equipment makers
US7477876B2 survives this litigation intact and enforceable. Brazos has historically asserted its wireless portfolio broadly across multiple defendants, and a prejudice-only dismissal against ZTE does not affect the patent's validity or its enforceability against third parties. Companies operating in the wireless CQI and channel feedback technology space — particularly those implementing 3G/4G scheduling and link-adaptation features — should treat this patent as an ongoing FTO risk.
Active enforcement risk for wireless sectorFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | WSOU Investments, LLC | Company | /Search in Eureka ↗ |
| Defendant | ZTE, Corp. | Company | /Search in Eureka ↗ |
| Plaintiff counsel | Darcy L. Jones | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Gregory Phillip Love | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Heather S. Kim | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | John W. Downing | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Jonathan K. Waldrop | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Marcus A. Barber | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Mark D. Siegmund | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Melissa Samano Ruiz | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Paul G. Williams | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Scott Russell Maynard | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff counsel | ThucMinh Nguyen | Attorney | Counsel for WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Cherry Johnson Siegmund James PLLC | Law Firm | Representing WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Kasowitz Benson Torres, LLP | Law Firm | Representing WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Rade LLC | Law Firm | Representing WSOU Investments, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Steckler Wayne Cherry & Love PLLC | Law Firm | Representing WSOU Investments, LLCSearch in Eureka ↗ |
| Defendant counsel | Lionel M. Lavenue | Attorney | Counsel for ZTE, Corp.Search in Eureka ↗ |
| Defendant law firm | Finnegan, Henderson, Farabow, Garrett & Dunner, LLP | Law Firm | Representing ZTE, Corp.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Western District CourtSearch in Eureka ↗ |
R&D signals in the wireless CQI and channel feedback patent space
Patent and innovation intelligence derived from the WSOU v. ZTE dispute — tracking filing trends, portfolio dynamics, and white-space opportunities in wireless channel quality feedback technology.
WSOU/Brazos wireless portfolio: what else is in the arsenal?
WSOU Investments holds a broad portfolio of former Nokia wireless patents beyond US7477876B2. Understanding the full scope of their CQI, link-adaptation, and uplink control filings is critical for any wireless equipment vendor conducting risk mapping. Portfolio analysis can reveal whether related divisional or continuation patents cover adjacent claim territory not reached by this specific litigation.
Portfolio depth analysisFiling trends in variable-rate CQI and link-adaptation patents
Variable rate CQI reporting remains an active area of patent filing activity as 5G NR introduces more complex channel state information (CSI) frameworks. Tracking recent filings in uplink CQI reporting, CSI-RS feedback, and adaptive MCS scheduling can reveal which incumbents and new entrants are staking out IP positions relevant to next-generation wireless standards.
5G CQI filing trendsZTE's patent position in wireless channel feedback and scheduling
As a defendant in this CQI patent dispute, ZTE's own patent filings in channel quality reporting, uplink scheduling, and adaptive modulation are relevant to understanding its defensive and offensive IP posture. Mapping ZTE's portfolio in these domains can indicate design-around strategies it may have developed and its relative strength as a licensor or cross-licensor in future wireless IP negotiations.
ZTE wireless IP positionAdjacent innovation gaps in dynamic CQI reporting architectures
Beyond the specific claim scope of US7477876B2, there may be filing white space in dynamic CQI compression, AI-driven channel state prediction, and low-latency feedback mechanisms for mmWave 5G. R&D teams developing next-generation wireless feedback protocols should assess whether novel approaches in these adjacent areas remain unencumbered by existing patent assertions.
CQI innovation white spaceSimilar wireless patent enforcement cases in W.D. Texas
Explore comparable patent infringement actions involving wireless communication patents litigated in the Western District of Texas, including other WSOU/Brazos assertions.
What this case signals for the wireless patent enforcement landscape
Brazos Licensing's pursuit of ZTE over a foundational wireless CQI patent highlights continued assertion pressure on telecom equipment makers in W.D. Texas.
W.D. Texas remains a primary venue for wireless patent enforcement actions
WSOU/Brazos has filed extensively in the Western District of Texas, making it a predictable enforcement venue for its wireless portfolio. Companies receiving demand letters referencing Brazos or WSOU should anticipate W.D. Texas filings and prepare accordingly, including assessing the assigned judge's Markman and claim construction tendencies.
US7477876B2 is still enforceable — third-party FTO review is warranted
The dismissal with prejudice resolves only the ZTE dispute. The patent remains active and Brazos retains full enforcement rights against all other parties. Any wireless equipment or chipset vendor whose products implement variable-rate CQI reporting mechanisms should conduct a targeted FTO analysis against US7477876B2 before this portfolio resurfaces in new proceedings.
WSOU v ZTE — key questions answered
The case was dismissed with prejudice by joint stipulation under Federal Rule of Civil Procedure 41(a)(1)(A)(ii), filed on 7 December 2023. Both parties agreed that all claims would be dismissed with prejudice and that each side would bear its own costs, expenses, and attorneys' fees. No damages award or injunction was entered.
WSOU Investments LLC asserted US7477876B2 (application number US10/002746), which covers variable rate channel quality feedback in a wireless communication system. This patent relates to CQI reporting mechanisms used in 3G and 4G cellular networks for dynamic link adaptation and scheduling.
No. A dismissal with prejudice bars WSOU/Brazos only from re-asserting the same claims against ZTE Corporation. US7477876B2 remains in force and fully enforceable against any other party. The patent's validity was not adjudicated in this proceeding, so its presumption of validity remains intact.
WSOU Investments was represented by attorneys including Jonathan K. Waldrop, Mark D. Siegmund, Gregory Phillip Love, and others from Cherry Johnson Siegmund James PLLC, Kasowitz Benson Torres LLP, Steckler Wayne Cherry & Love PLLC, and Rade LLC. ZTE Corporation was represented by Lionel M. Lavenue of Finnegan, Henderson, Farabow, Garrett & Dunner LLP.
The stipulation specifies that each party bears its own costs, expenses, and attorneys' fees, meaning neither side was ordered to pay the other's litigation costs. No fee award was entered. The specific commercial terms underlying the decision to dismiss — if any exist — are not disclosed in the available public record.
This page is compiled from public court dockets and third-party patent and litigation data via PatSnap Eureka, and is provided for general informational purposes only. The information shown — including party names, patent and application numbers, dates, case status, outcomes, and any analysis — may be incomplete, may not reflect the most recent filings or legal status, and may contain errors or omissions. Verify all details against official court records (for example, PACER) and the relevant patent office before relying on them.
Nothing on this page constitutes legal advice or a legal opinion on the validity, infringement, enforceability, or scope of any patent or case, and no attorney‑client relationship is created by its use. Any description of an outcome (such as a dismissal, settlement, or consent judgment) is a general summary, not a legal determination. All patents, trademarks, and company or law‑firm names are the property of their respective owners. PatSnap makes no warranty as to the accuracy or completeness of this content and disclaims, to the fullest extent permitted by law, all liability for reliance on it. For advice on a specific matter, consult qualified legal counsel.
PatSnap Eureka searches patents and litigation data to answer instantly.