Cobblestone Wireless v. Verizon: Carrier Aggregation Patent Dispute Ends With Prejudice
Cobblestone Wireless asserted US7924802B2 — covering 3GPP carrier aggregation — against Verizon Wireless and related carriers in the Eastern District of Texas. After 420 days of litigation involving multiple defendants and intervenors including Nokia and Ericsson, all parties jointly moved to dismiss with prejudice, each bearing their own costs.
Multi-carrier 3GPP patent dispute resolved by joint dismissal with prejudice
On August 25, 2023, Cobblestone Wireless, LLC filed suit in the Eastern District of Texas against Cellco Partnership (Verizon Wireless), asserting US7924802B2, a patent covering cellular base stations, mobile products, and services that support 3GPP carrier aggregation. The case expanded to encompass additional defendants including T-Mobile USA, AT&T Services, AT&T Mobility, and AT&T Enterprises, as well as technology intervenors Nokia of America Corporation and Ericsson Inc.
On October 18, 2024, the court granted a joint motion to dismiss all claims with prejudice, closing the case after 420 days. A dismissal with prejudice is a final adjudication on the merits — Cobblestone is permanently barred from re-asserting the same claims under US7924802B2 against these defendants and intervenors in any future proceeding. The mutual cost-bearing arrangement suggests the parties reached a negotiated resolution rather than a contested courtroom victory.
A 420-day lifespan that draws in multiple major carriers and infrastructure vendors before resolution is consistent with either a licensing agreement or a coordinated settlement. The public record does not disclose financial terms. The involvement of Nokia and Ericsson as intervenors — both major suppliers of 3GPP-compliant base station equipment — suggests the dispute touched upstream technology supply chains, which likely accelerated pressure toward resolution across the defendant group.
Filing to Dismissed with Prejudice in 420 days
420 days — above the median for resolved E.D. Texas patent cases, suggesting substantive negotiation before resolution
Dismissed with prejudice: what the joint motion means for both parties
Dismissal with prejudice forecloses all future claims on these facts
A dismissal with prejudice operates as a final judgment on the merits. Under federal procedural rules, Cobblestone cannot refile the same infringement claims under US7924802B2 against Verizon, T-Mobile, AT&T, Nokia, or Ericsson in any court. The joint nature of the motion — signed by all parties — confirms mutual agreement, distinguishing this from a unilateral plaintiff withdrawal.
Res judicata appliesCobblestone surrenders future claims — likely in exchange for undisclosed value
Agreeing to dismiss with prejudice is a significant concession for a patent assertion entity. Cobblestone permanently loses the right to pursue these defendants on US7924802B2. This outcome is consistent with a licensing payment or structured settlement, though no financial terms appear in the public record. The breadth of defendants covered — three carriers plus two infrastructure vendors — may have made a global resolution commercially attractive.
Claims extinguishedVerizon, AT&T, T-Mobile and vendors gain permanent immunity on this patent
All named defendants and intervenors obtain res judicata protection against Cobblestone’s claims under US7924802B2. Nokia and Ericsson, as base station suppliers, also secured their positions as intervenors. Each party bearing its own costs suggests no party was adjudged as prevailing — a typical feature of negotiated exits. The defendants retain their freedom to operate 3GPP carrier aggregation infrastructure without future exposure from this specific patent.
Freedom to operate securedCarrier aggregation IP cleared — but US7924802B2 remains active against others
The dismissal resolves exposure for these defendants only. US7924802B2 remains in force and Cobblestone retains the right to assert it against any party not covered by this dismissal. Other operators, MVNOs, or equipment vendors deploying 3GPP carrier aggregation technology should note the patent’s enforceability was not adjudicated on the merits — no invalidity finding was made. Monitoring Cobblestone’s filing activity remains prudent for anyone in the 5G and LTE infrastructure supply chain.
Patent still live vs. third partiesFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Cobblestone Wireless, LLC | Company | Patent assertion entity — holder of US7924802B2 covering 3GPP carrier aggregationSearch in Eureka ↗ |
| Defendant | Cellco Partnership, (dba Verizon Wireless) | Individual | Cellco Partnership dba Verizon Wireless — major U.S. mobile network operatorSearch in Eureka ↗ |
| Plaintiff counsel | Amy Elizabeth Hayden | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Andrea Leigh Fair | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Christian W. Conkle | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Jacob Buczko | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Jason Wietholter | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Jonathan Ma | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Marc A. Fenster | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Matthew D. Aichele | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Neil Alan Rubin | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Qi Tong | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Reza Mirzaie | Attorney | Counsel for Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Miller Fair Henry PLLC | Law Firm | Representing Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Russ August & Kabat LLP | Law Firm | Representing Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Russ August & Kabat LLP (DC) | Law Firm | Representing Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Russ August & Kabat LLP (Los Angeles) | Law Firm | Representing Cobblestone Wireless, LLCSearch in Eureka ↗ |
| Defendant counsel | Adam Bertram Ahnhut | Attorney | Counsel for Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant counsel | David S. Frist | Attorney | Counsel for Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant counsel | Deron R. Dacus | Attorney | Counsel for Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant counsel | Emily Chambers Welch | Attorney | Counsel for Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant counsel | John Daniel Haynes | Attorney | Counsel for Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant counsel | Michael Clayton Deane | Attorney | Counsel for Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant counsel | Ross Ritter Barton | Attorney | Counsel for Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant counsel | Sloane Sueanne Kyrazis | Attorney | Counsel for Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant law firm | Alston & Bird LLP | Law Firm | Representing Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant law firm | Alston & Bird LLP (Atlanta) | Law Firm | Representing Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant law firm | Alston & Bird LLP (Dallas) | Law Firm | Representing Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Defendant law firm | The Dacus Firm PC | Law Firm | Representing Cellco Partnership, (dba Verizon Wireless)Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order grants the joint motion without independent merits analysis, confirming all claims are extinguished by agreement rather than adjudication. The phrase ‘DISMISSED WITH PREJUDICE’ forecloses re-litigation between these specific parties. Notably, the order covers not only the named defendants but also intervenors Nokia and Ericsson — providing unusually broad immunity for equipment vendors. The denial of all other pending relief as moot suggests substantive motions, potentially including claim construction or summary judgment proceedings, were pending at the time of settlement.
US7924802B2 — 3GPP Carrier Aggregation for Cellular Base Stations
US7924802B2, filed under application number US12/018370, covers technology relating to 3GPP carrier aggregation — a core LTE-Advanced and 5G NR capability that allows a device to simultaneously use multiple radio frequency bands to increase throughput and efficiency. Carrier aggregation is a foundational feature of modern mobile networks, embedded in base station infrastructure and handset modems across every major operator’s deployment. The patent’s scope across ‘cellular base stations, mobile products, and services’ positions it broadly across the hardware-software stack.
The commercial significance of US7924802B2 derives from how deeply 3GPP carrier aggregation is embedded in contemporary network deployments. Every major U.S. carrier relies on carrier aggregation for LTE-A and 5G performance targets, making this patent a high-leverage assertion vehicle against the entire MNO ecosystem. The simultaneous naming of infrastructure intervenors Nokia and Ericsson confirms the patent’s reach into base station equipment — a supply chain implication that extends beyond operators to RAN vendors, chipset manufacturers, and MVNO operators who license network capacity.
Should you run an FTO against US7924802B2?
Any company developing, deploying, or supplying equipment that implements 3GPP carrier aggregation — including LTE-A base stations, 5G NR radio units, and multi-band mobile devices — should treat US7924802B2 as an active enforcement risk. This case demonstrates Cobblestone’s willingness to assert the patent against multiple major operators simultaneously and to pursue infrastructure vendors as intervenors. Regional carriers, cable wireless operators, and MVNOs who were not party to this dismissal have no protection from future assertion.
PatSnap Eureka’s FTO Search Agent can map US7924802B2’s claim scope against your specific product architecture, flag forward citations that may indicate related patents in Cobblestone’s portfolio, and identify prior art that could support an IPR petition. For R&D teams designing carrier aggregation features into next-generation radio products, Eureka’s landscape analysis can surface design-around opportunities and benchmark claim scope against the current 3GPP standards body outputs.
Run a freedom-to-operate analysis on US7924802B2 to assess your product’s exposure
Run FTO in Eureka →Similar 3GPP carrier aggregation patent cases in E.D. Texas
Explore related NPE assertions involving 3GPP and LTE-Advanced patents filed in the Eastern District of Texas against major U.S. mobile network operators.
What this case signals for the 3GPP carrier aggregation IP landscape
A coordinated multi-carrier resolution in E.D. Texas points to structured licensing strategy — not isolated enforcement.
Nokia and Ericsson’s intervention signals upstream supply chain exposure
When base station vendors intervene in a carrier-level patent case, it typically signals that liability risk flows upstream to equipment suppliers. Any company supplying 3GPP carrier aggregation hardware or software to U.S. operators should assess whether their indemnification obligations are adequately scoped against Cobblestone’s remaining portfolio.
E.D. Texas venue continues to attract multi-defendant NPE assertions
Filing a single case against multiple major carriers in the Eastern District of Texas is a recognised strategy for maximising settlement leverage. The 420-day duration and joint dismissal outcome here is consistent with a coordinated licensing resolution — a pattern that IP counsel at MNOs should anticipate when assessing NPE risk in this jurisdiction.
Cobblestone v Cellco — key questions answered
The dismissal with prejudice is a final resolution — Cobblestone Wireless cannot refile infringement claims under US7924802B2 against Verizon, T-Mobile, AT&T, Nokia, or Ericsson. It operates as res judicata against all named parties. No merits determination was made; the case resolved by joint agreement before trial.
Nokia and Ericsson are major suppliers of 3GPP-compliant base station infrastructure to U.S. carriers. Their intervention suggests that Cobblestone’s patent claims implicated the base station equipment supplied by these vendors. Intervenors typically seek to protect their customers or defend against indemnification obligations — and their inclusion in the dismissal order secured their own protection from future assertion.
US7924802B2 covers technology related to 3GPP carrier aggregation — a feature that allows mobile devices and base stations to combine multiple frequency bands simultaneously to improve data throughput. Carrier aggregation is a core component of LTE-Advanced and 5G NR deployments. The patent was asserted against cellular base stations, mobile products, and services implementing this capability.
No. The dismissal with prejudice covers only the named parties — Verizon, T-Mobile, AT&T entities, Nokia, and Ericsson. US7924802B2 remains in force and enforceable against any third party not covered by this order. Regional carriers, MVNOs, cable wireless operators, and equipment vendors not party to this case retain full exposure to future assertion by Cobblestone.
No. The case resolved by joint motion before any merits adjudication. The court made no finding on validity, infringement, or enforceability of US7924802B2. The patent’s legal status is unchanged by this dismissal — it remains a presumptively valid, enforceable U.S. patent that can be asserted against parties not covered by this specific dismissal order.
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