ASSIA v. AT&T: Five Broadband Patents, One Joint Dismissal — 451 Days
Adaptive Spectrum and Signal Alignment (ASSIA) filed suit against AT&T in the Eastern District of Texas asserting five U.S. patents covering DSL and fiber broadband signal management across AT&T’s consumer and business broadband portfolio. After 451 days of litigation, the parties filed a joint stipulation dismissing ASSIA’s infringement claims with prejudice and AT&T’s counterclaims without prejudice, with each side bearing its own costs.
Broadband signal patent showdown ends in bilateral dismissal
On January 19, 2024, ASSIA — a specialist DSL and broadband signal optimisation IP licensor — filed suit against AT&T, Inc. and five AT&T subsidiaries in the Eastern District of Texas (Case No. 2:24-cv-00029). The complaint asserted infringement of five U.S. patents (US7809996B2, US11477108B2, US10848398B2, US11050654B2, and US11770313B2) against AT&T’s broadband product line, including AT&T Fiber, AT&T U-Verse, AT&T DSL, and associated business broadband services.
The case closed on April 14, 2025, via a joint stipulation and motion to dismiss. ASSIA’s infringement claims (claims 2, 3, 4) were dismissed with prejudice, meaning ASSIA cannot re-file those specific claims. AT&T’s non-infringement counterclaims (counterclaims 2, 3, 4) and remaining counterclaims (5, 6, 7) were dismissed without prejudice, preserving AT&T’s theoretical ability to reassert them. Each party bears its own attorney fees and costs, suggesting no monetary resolution was publicly disclosed.
The 451-day timeline, combined with a with-prejudice dismissal of ASSIA’s claims and a cost-neutral outcome, is consistent with a confidential settlement or licence agreement reached between the parties — though the public record is silent on financial terms. The without-prejudice dismissal of AT&T’s counterclaims, including what appear to be invalidity defences, leaves those arguments technically unresolved. Whether ASSIA received a licensing payment or simply withdrew remains unknown from the docket alone.
Filing to Case Dismissed in 451 days
451 days — above the median for E.D. Tex. patent cases that resolve pre-trial
Joint stipulation unpacked: what the dismissal terms mean for each party
With-prejudice dismissal bars ASSIA from re-filing these claims
Under Rule 41, a dismissal with prejudice operates as a final adjudication on the merits. ASSIA agreed to dismiss its infringement claims (claims 2, 3, 4) with prejudice, foreclosing any future action on those specific claims against AT&T on these patents in this litigation context. AT&T’s counterclaims were dismissed without prejudice — a deliberately asymmetric structure that is a hallmark of negotiated resolution.
Rule 41 — with prejudiceASSIA’s claims extinguished — licensing deal strongly implied
Agreeing to a with-prejudice dismissal of its own infringement claims is a significant concession by ASSIA, unless compensated by a confidential licence or settlement payment. ASSIA retains the five asserted patents and may pursue enforcement against other operators. However, a re-assertion against AT&T on these specific claims would face substantial res judicata obstacles. The cost-neutral outcome suggests the commercial terms, if any, were handled outside the docket.
Possible confidential licenceAT&T preserves counterclaim rights — invalidity arguments unresolved
AT&T’s counterclaims — including non-infringement arguments and what appear to be invalidity or other defences — were dismissed without prejudice, meaning those positions were never adjudicated on the merits. This preserves AT&T’s ability to raise comparable arguments if ASSIA pursues enforcement of these patents in future proceedings, including potential IPR petitions at the USPTO. The cost-neutral structure means AT&T bore its own defence costs.
Counterclaims unresolvedFive broadband signal patents remain active enforcement tools
The five ASSIA patents — covering DSL and fiber broadband signal optimisation and management — emerge from this litigation with no validity ruling and no claim construction on record. For other broadband and telco operators deploying similar DSL, fiber, or managed broadband technologies, these patents remain live enforcement risks. ASSIA’s litigation history suggests a systematic licensing programme, and the E.D. Tex. venue choice reinforces a plaintiff-friendly enforcement posture.
Ongoing enforcement riskFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Adaptive Spectrum and Signal Alignment, Inc. | Company | DSL/broadband signal optimisation IP licensor — holder of US7809996B2 and four related patentsSearch in Eureka ↗ |
| Defendant | AT&T, Inc. | Company | AT&T, Inc. and five subsidiaries — major U.S. telecommunications and broadband providerSearch in Eureka ↗ |
| Co-Defendant | At & T Services, Inc. | Company | Search in Eureka ↗ |
| Co-Defendant | At & T Mobility II, LLC | Company | Search in Eureka ↗ |
| Co-Defendant | AT & T, Corp. | Company | Search in Eureka ↗ |
| Co-Defendant | AT & T Mobility, LLC | Company | Search in Eureka ↗ |
| Co-Defendant | At & T Communications, LLC | Company | Search in Eureka ↗ |
| Plaintiff counsel | Andrea Leigh Fair | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Austin Curry | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Bailey Alexandra Blaies | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Bjorn A. Blomquist | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Bradley Wayne Caldwell | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | David Alberti | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Hamad M. Hamad | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Hong S Lin | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Jason Dodd Cassady | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Justin Thomas Nemunaitis | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Melissa Richards Smith | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Nicole E. Glauser | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Paul Ashton Duke | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Robert F. Kramer | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Russell Steven Tonkovich | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Sal Lim | Attorney | Counsel for Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Caldwell Cassady Curry PC | Law Firm | Representing Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Gillam & Smith, LLP | Law Firm | Representing Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Kramer Alberti Lim & Tonkovich LLP | Law Firm | Representing Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Miller Fair Henry PLLC | Law Firm | Representing Adaptive Spectrum and Signal Alignment, Inc.Search in Eureka ↗ |
| Defendant counsel | David S. Frist | Attorney | Counsel for AT&T, Inc.Search in Eureka ↗ |
| Defendant counsel | Deron R. Dacus | Attorney | Counsel for AT&T, Inc.Search in Eureka ↗ |
| Defendant counsel | Matthew Scott Stevens | Attorney | Counsel for AT&T, Inc.Search in Eureka ↗ |
| Defendant counsel | Nicholas Christopher Marais | Attorney | Counsel for AT&T, Inc.Search in Eureka ↗ |
| Defendant counsel | Theodore Stevenson , III | Attorney | Counsel for AT&T, Inc.Search in Eureka ↗ |
| Defendant law firm | Alston & Bird LLP | Law Firm | Representing AT&T, Inc.Search in Eureka ↗ |
| Defendant law firm | Alston & Bird LLP (Atlanta) | Law Firm | Representing AT&T, Inc.Search in Eureka ↗ |
| Defendant law firm | The Dacus Firm PC | Law Firm | Representing AT&T, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order accepting the joint stipulation reflects a purely procedural closure — no merits were adjudicated. The deliberate asymmetry in dismissal terms (ASSIA’s claims dismissed with prejudice; AT&T’s counterclaims without prejudice) is commercially significant: it suggests the parties negotiated the case to a conclusion that released AT&T from further infringement exposure on these claims while preserving AT&T’s legal positions for any future proceeding. The cost-neutral fee arrangement, with each party bearing its own costs, is consistent with a negotiated resolution rather than a clear win for either side.
US7809996B2 — DSL broadband signal management and optimisation
The five asserted patents — US7809996B2, US11477108B2, US10848398B2, US11050654B2, and US11770313B2 — cover methods and systems for managing, aligning, and optimising signals across DSL and fiber broadband networks, including vectoring, fault diagnostics, and network performance management. The application dates span from US12/185729 (a relatively early filing) through to US17/102099, indicating a sustained prosecution strategy by ASSIA building out claim coverage across successive generations of broadband technology. ASSIA traces its origins to Stanford University research in DSL signal processing, lending these patents a foundational character in their technical domain.
For broadband operators deploying DSL, VDSL, or managed fiber infrastructure, ASSIA’s portfolio represents one of the most strategically significant patent families in the sector. The breadth of the product list named in this complaint — spanning consumer DSL, business fiber, U-Verse IPTV infrastructure, and third-party CPE hardware — indicates ASSIA interprets these patents as covering core signal management functions present across virtually all managed broadband deployments. No adverse claim construction or invalidity ruling has emerged from this or prior ASSIA litigation, maintaining full enforcement potency.
Should you run an FTO against US7809996B2 and the ASSIA broadband portfolio?
Any operator, equipment vendor, or managed service provider active in DSL, VDSL2, fiber, or managed broadband signal processing should treat the ASSIA portfolio as a live FTO concern. The product scope asserted against AT&T — spanning consumer and business broadband, CPE hardware, and network infrastructure — suggests ASSIA construes its patent claims broadly. R&D teams building vectoring, noise management, diagnostics, or performance optimisation layers into broadband networks are directly in scope.
PatSnap Eureka’s FTO Search Agent enables R&D and IP teams to map the five ASSIA patents against your specific product architecture and signal management implementation. Eureka identifies claim-level overlap, surfaces the closest prior art that AT&T’s legal team may have developed during discovery, and flags any continuation applications still in prosecution that could extend ASSIA’s coverage. Run a targeted FTO before your next broadband product launch or licensing negotiation.
Run a freedom-to-operate analysis on US7809996B2 to assess your product’s exposure
Run FTO in Eureka →Similar DSL and fiber broadband patent cases in E.D. Texas
Explore related patent infringement actions asserting DSL, fiber, and broadband signal management patents in the Eastern District of Texas against major U.S. carriers.
What this case signals for the broadband and DSL IP landscape
ASSIA’s five-patent assertion against AT&T’s entire broadband stack signals an aggressive licensing posture across U.S. telco infrastructure.
E.D. Tex. remains the venue of choice for broadband IP enforcement
ASSIA’s filing in the Eastern District of Texas — a historically plaintiff-favourable forum — against a national carrier like AT&T signals a calculated enforcement strategy. Other DSL and fiber operators should treat this filing as a marker of ASSIA’s willingness to litigate at scale in favourable jurisdictions.
With-prejudice dismissal without a public ruling leaves patent validity unresolved
No claim construction order, no validity ruling, and no damages determination emerged from 451 days of litigation. The five asserted patents — US7809996B2, US11477108B2, US10848398B2, US11050654B2, and US11770313B2 — carry no adverse judicial record. Competitors and licensees cannot rely on this outcome as a validity shield.
Adaptive v AT&T — key questions answered
ASSIA asserted five U.S. patents: US7809996B2, US11477108B2, US10848398B2, US11050654B2, and US11770313B2. All five relate to DSL and broadband signal management, alignment, and network optimisation technologies across AT&T’s consumer and business broadband products.
The asymmetric dismissal structure — ASSIA’s infringement claims dismissed with prejudice, AT&T’s counterclaims without prejudice — is consistent with a negotiated resolution. With prejudice bars ASSIA from re-filing those specific claims, while without prejudice preserves AT&T’s invalidity and non-infringement arguments for any future proceeding without treating them as adjudicated on the merits.
Not necessarily. A with-prejudice dismissal by joint stipulation does not constitute a merits victory for AT&T. It reflects an agreed termination — commonly associated with a confidential settlement or licence. No court ruled on infringement or validity. The public record is silent on whether any payment was made.
ASSIA’s complaint named AT&T Broadband, AT&T Business Broadband, AT&T Business DSL, AT&T Business Fiber, AT&T DSL, AT&T Fiber, AT&T Business Internet, AT&T U-Verse, and the DSL 2Wire 2701 CPE hardware — effectively AT&T’s entire consumer and business managed broadband product line.
Yes. The with-prejudice dismissal applies only to ASSIA’s specific claims against AT&T in this case. ASSIA retains all five patents and can assert them against other operators including Verizon, Comcast, Lumen, or equipment vendors. No validity ruling, claim construction, or adverse finding limits ASSIA’s enforcement rights against third parties.
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