Cobblestone Wireless v. T-Mobile: Carrier Aggregation Patent Dismissed With Prejudice
Cobblestone Wireless, LLC filed suit in the Eastern District of Texas against T-Mobile, AT&T entities, and cellular equipment intervenors Nokia and Ericsson, asserting US7924802B2 covering 3GPP carrier aggregation across cellular base stations and mobile products. The case resolved and was dismissed with prejudice after 420 days, with each party bearing its own costs.
A Multi-Defendant Carrier Aggregation Dispute Ends in Prejudicial Dismissal
On August 25, 2023, Cobblestone Wireless, LLC filed a patent infringement action in the Eastern District of Texas against T-Mobile USA, Inc., asserting US7924802B2, which covers 3GPP carrier aggregation technology as implemented in cellular base stations, mobile products, and related services. The accused products included Apple mobile devices distributed or enabled through the defendant carriers’ networks. The case attracted intervenors Nokia of America Corporation and Ericsson Inc., reflecting the infrastructure-level significance of the asserted technology.
After 420 days of litigation, the parties filed a Joint Motion to Dismiss representing that the case had been resolved. The Eastern District of Texas granted the motion on October 18, 2024, dismissing all claims and causes of action with prejudice. Crucially, the court’s order specified that each party would bear its own costs, expenses, and attorneys’ fees, suggesting the resolution terms did not include a public fee-shifting arrangement. Dismissal with prejudice extinguishes Cobblestone’s ability to reassert the same claims against these defendants.
The 420-day duration, combined with the involvement of intervenors Nokia and Ericsson, suggests the matter progressed through meaningful pretrial activity before a confidential resolution was reached. The with-prejudice nature of the dismissal and the mutual cost-bearing provision are consistent with a negotiated settlement, though the financial terms remain undisclosed. What drove the resolution — whether claim construction concerns, IPR exposure, or commercial licensing terms — is not reflected in the public record.
Filing to Dismissed with Prejudice in 420 days
420 days — above the median for E.D. Tex. patent cases that close before trial
Dismissed with prejudice: what the joint order means for both parties
With-prejudice dismissal bars all future reassertion of these claims
A dismissal with prejudice under Rule 41 is a final adjudication on the merits for res judicata purposes. Cobblestone Wireless cannot refile the same patent infringement claims against T-Mobile, AT&T, Nokia, or Ericsson based on US7924802B2 in any U.S. federal court. The joint nature of the motion indicates mutual agreement, strongly suggesting an underlying settlement whose financial terms remain confidential.
Final — no refiling permittedWith prejudice forecloses future enforcement against these defendants
Unlike a voluntary dismissal without prejudice — which preserves the right to refile — a with-prejudice dismissal permanently extinguishes the asserted claims against each named defendant and intervenor. The public record specifies ‘WITH prejudice’ explicitly. This distinction is commercially significant: Cobblestone cannot revisit these defendants on the same patent, even if new infringing products are released under the same underlying technology.
Permanent bar against defendantsCobblestone trades enforcement rights for presumed confidential consideration
Cobblestone Wireless’s agreement to dismiss with prejudice — rather than without prejudice — typically signals receipt of some form of consideration, most likely a licensing agreement or lump-sum payment. The patent US7924802B2 may retain value against parties not named in this action, but its enforceability against the major U.S. carriers and their key infrastructure vendors is now foreclosed by this order.
Likely licensed; further suits limitedT-Mobile, AT&T, Nokia, and Ericsson achieve litigation finality
The with-prejudice dismissal provides T-Mobile, the AT&T entities, and intervenors Nokia and Ericsson with a complete defense against any future assertion of US7924802B2 by Cobblestone on the same claims. The mutual cost-bearing provision avoids fee-shifting exposure under 35 U.S.C. § 285, suggesting neither party sought — or could sustain — an ‘exceptional case’ finding. Operationally, carrier aggregation deployments by these defendants face no further Cobblestone infringement risk on this patent.
Full res judicata protection securedFull 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 | T-Mobile | Individual | T-Mobile USA, Inc. — major U.S. wireless carrier operating 4G/5G cellular networksSearch in Eureka ↗ |
| Plaintiff counsel | Amy Elizabeth Hayden | 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 | 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 | David S. Frist | Attorney | Counsel for T-MobileSearch in Eureka ↗ |
| Defendant counsel | Emily Chambers Welch | Attorney | Counsel for T-MobileSearch in Eureka ↗ |
| Defendant counsel | John Daniel Haynes | Attorney | Counsel for T-MobileSearch in Eureka ↗ |
| Defendant counsel | Melissa Richards Smith | Attorney | Counsel for T-MobileSearch in Eureka ↗ |
| Defendant counsel | Michael Clayton Deane | Attorney | Counsel for T-MobileSearch in Eureka ↗ |
| Defendant counsel | Sloane Sueanne Kyrazis | Attorney | Counsel for T-MobileSearch in Eureka ↗ |
| Defendant law firm | Alston & Bird LLP (Atlanta) | Law Firm | Representing T-MobileSearch in Eureka ↗ |
| Defendant law firm | Gillam & Smith, LLP | Law Firm | Representing T-MobileSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order tracks the joint motion language precisely, granting dismissal of all claims and causes of action with prejudice as to every named party — plaintiff, defendants, and intervenors. The explicit ‘WITH prejudice’ designation carries res judicata effect, foreclosing any future Cobblestone suit on these claims against these parties. The mutual cost-bearing provision is notable: it suggests neither party sought nor obtained an exceptional-case fee award under 35 U.S.C. § 285, consistent with a negotiated exit rather than a merits adjudication.
US7924802B2 — 3GPP Carrier Aggregation for Cellular Networks
US7924802B2, filed under application number US12/018370, covers 3GPP carrier aggregation technology — the technique by which modern cellular networks bond multiple frequency bands to increase data throughput and spectral efficiency. Carrier aggregation is a foundational feature of LTE-Advanced and 5G NR standards, making this patent potentially essential or near-essential to contemporary mobile network deployments. The patent’s claims, as asserted, extend to cellular base station infrastructure and mobile handsets that implement the relevant 3GPP aggregation procedures.
The strategic value of US7924802B2 lies in its position at the intersection of cellular infrastructure and device markets. By naming both carriers (T-Mobile, AT&T) and infrastructure OEMs (Nokia, Ericsson) as defendants or intervenors, Cobblestone pursued a full-stack enforcement strategy. Patents covering 3GPP standard-essential or standard-adjacent technologies attract heightened scrutiny around FRAND licensing obligations and SEP declaration status — factors that any company designing or deploying carrier aggregation-capable systems must evaluate when assessing litigation risk or licensing exposure.
Should you run an FTO analysis against US7924802B2?
Any company manufacturing, importing, or deploying cellular base stations, LTE or 5G handsets, or network equipment supporting 3GPP carrier aggregation should treat US7924802B2 as a live FTO risk. The dismissal with prejudice binds only the named defendants and intervenors. MVNOs, regional carriers, device OEMs, and enterprise private network operators who were not party to this action remain potentially exposed to assertion by Cobblestone Wireless or any subsequent assignee of the patent.
PatSnap Eureka’s FTO Search Agent can map US7924802B2 claim scope against your product specifications, surface prosecution history disclaimers, and identify prior art that may support invalidity arguments. Eureka also tracks the Cobblestone Wireless portfolio for newly filed continuations or related applications that may extend claim coverage beyond the ‘802 patent — critical intelligence for any R&D or product team building 3GPP-compliant systems.
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 patent infringement actions asserting 3GPP carrier aggregation and LTE/5G standard-adjacent patents in the Eastern District of Texas against major wireless carriers.
What this case signals for the wireless carrier aggregation IP landscape
Multi-defendant 3GPP patent suits in E.D. Tex. are rising. This resolution pattern has direct implications for cellular IP strategy.
Infrastructure intervenors signal high-value 3GPP patent disputes
The intervention by Nokia and Ericsson — both primary RAN equipment suppliers — indicates that carrier aggregation patents can trigger indemnification obligations up the supply chain. Companies licensing or acquiring 3GPP-related patents should map intervenor exposure across their vendor ecosystem before asserting or defending such claims.
With-prejudice joint dismissals are a settlement proxy in PAE litigation
In Eastern District of Texas patent cases brought by patent assertion entities, a joint motion to dismiss with prejudice and mutual cost-bearing is a reliable indicator of a confidential settlement. IP teams tracking Cobblestone Wireless’s licensing activity should treat this outcome as a likely licensing event rather than a defendant win on the merits.
Cobblestone v T-Mobile — key questions answered
Dismissal with prejudice in Case No. 2:23-cv-00381 means all of Cobblestone Wireless’s infringement claims under US7924802B2 against T-Mobile, the AT&T entities, Nokia, and Ericsson are permanently extinguished. Cobblestone cannot refile the same claims against these defendants in any U.S. federal court. This is a final judgment for res judicata purposes.
Cobblestone Wireless asserted US7924802B2, filed under application number US12/018370. The patent covers 3GPP carrier aggregation technology as implemented in cellular base stations, mobile products, and services. The accused products included Apple mobile devices distributed through the defendants’ networks, as well as T-Mobile and AT&T infrastructure.
Nokia of America Corporation and Ericsson Inc. intervened as parties, most likely because the asserted patent — US7924802B2 covering 3GPP carrier aggregation — implicates radio access network equipment they supply to T-Mobile and AT&T. Infrastructure OEMs commonly intervene where carrier defendants hold indemnification rights against their equipment vendors for patent infringement arising from the vendors’ products.
The public record does not disclose settlement terms. However, the joint motion to dismiss stated that the case ‘has been resolved,’ and the court granted dismissal with prejudice with each party bearing its own costs. This pattern — joint motion, with-prejudice dismissal, mutual cost-bearing — is strongly consistent with a confidential licensing or settlement agreement, though the financial terms are not publicly available.
The court’s order that each party bear its own costs, expenses, and attorneys’ fees means no fee-shifting was awarded under 35 U.S.C. § 285 or otherwise. This is a neutral resolution on costs, consistent with a negotiated settlement. It indicates that neither T-Mobile nor Cobblestone pursued — or successfully obtained — an ‘exceptional case’ designation, which would have required a showing of litigation misconduct or objectively unreasonable positions.
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