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Sonrai Memory v. Micron Technology: SSD Patent Litigation | PatSnap
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Case ID1:23-cv-01407
FiledAug 2022
ClosedSep 2024
Patent Litigation

Sonrai Memory & Nera Innovations v. Micron Technology — Dismissed With Prejudice After 752 Days

Patent assertion entity Sonrai Memory Ltd. and co-plaintiff Nera Innovations Limited brought a two-patent infringement action against Micron Technology targeting over 24 SSD and UFS product lines. The case resolved with a court-ordered dismissal with prejudice — barring any refiling of the same claims — after 752 days of litigation before Judge Alan D. Albright in the Western District of Texas.

Resolution time
752days
752 days — notably longer than the W.D. Texas median for settled patent cases
Patents asserted
2
US6724241B1 and US6920527B2 — flash memory architecture and SSD control technology
Outcome
Dismissed with Prejudice
Claims permanently barred; parties bear their own attorneys’ fees and costs
Cost ruling
Each Party Pays Own Costs
Court ordered all fees, costs, and expenses borne by the party incurring same
Published by PatSnap Insights Team · Verified by PatSnap Eureka Data
Case overview

NVMe and SATA SSD Portfolio Under Fire: How Micron Closed the Case

Filed in August 2022 in the Western District of Texas before Judge Alan D. Albright, this infringement action pitted patent assertion vehicles Sonrai Memory Ltd. and Nera Innovations Limited against Micron Technology, Inc. — one of the world’s largest DRAM and NAND flash manufacturers. The plaintiffs asserted two patents, US6724241B1 and US6920527B2, against an expansive product portfolio spanning at least 24 Micron and Crucial-branded SSD and UFS 4.0 products, including enterprise NVMe drives and consumer SATA SSDs.

The case closed on 6 September 2024 when the parties jointly announced a resolution and requested dismissal with prejudice. The court granted that request in full, ordering all claims dismissed with prejudice and all attorneys’ fees, costs, and expenses to be borne by the party that incurred them. A dismissal with prejudice is a final adjudication on the merits under federal procedure, meaning the plaintiffs cannot re-assert these specific claims against Micron in any subsequent action.

At 752 days from filing to closure, the timeline suggests substantial pre-trial litigation activity — including potentially claim construction proceedings and discovery — before the parties reached resolution. The absence of any publicly reported damages award or licensing figure is consistent with a confidential settlement, though the public record is silent on financial terms. What drove the resolution remains undisclosed; however, the with-prejudice dismissal and mutual cost-bearing arrangement are hallmarks of a negotiated outcome rather than a unilateral concession.

Case at a glance
Case no.1:23-cv-01407
CourtTexas Western
JudgeAlan D Albright
FiledAugust 16, 2022
ClosedSeptember 6, 2024
Duration752 days
OutcomeDismissed with Prejudice
Verdict causeInfringement Action
BasisDismissed with Prejudice
Prior Art Intelligence
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Case data sourced from PACER / Texas Western District Court via PatSnap Eureka Litigation Intelligence Explore similar cases ↗
Case timeline

Filing to Dismissed with Prejudice in 752 days

752 days — notably longer than the W.D. Texas median for settled patent cases

Case timeline: Complaint filed AUG 16 2022, AUG–SEP — 752 days total Horizontal timeline showing the three key events in Sonrai Memory, Ltd. v Micron Technology, Inc. from filing to resolution. Source: PACER, Texas Western District Court. AUG 16 2022 Complaint filed Pre-trial proceedings SEP 6 2024 Dismissed with Prejudice 752 DAYS TOTAL
Dismissal terms

Dismissed with prejudice: what the final order means for both parties

Legal mechanism

Dismissal with prejudice extinguishes all asserted claims permanently

A dismissal with prejudice operates as a final judgment on the merits under federal civil procedure. Unlike a without-prejudice dismissal — which preserves the right to refile — this order permanently bars Sonrai Memory and Nera Innovations from reasserting these specific infringement claims against Micron. The court’s granting of the joint motion reflects that both sides agreed to this finality, which is a defining feature of most negotiated patent resolutions.

Claims permanently extinguished
Plaintiff outcome

Plaintiffs lose the right to refile; any value extracted was pre-dismissal

By consenting to a with-prejudice dismissal, Sonrai Memory and Nera Innovations surrendered any future enforcement rights against Micron under these two patents. Whatever consideration — financial or otherwise — the plaintiffs received, if any, would have been agreed privately before the joint motion was filed. The public record discloses no damages award, no royalty rate, and no injunctive relief, leaving the commercial outcome of the assertion campaign opaque.

No public damages disclosed
Defendant outcome

Micron secures permanent closure on 24+ SSD product lines

For Micron, the with-prejudice dismissal provides legal certainty across its entire accused product portfolio — including enterprise NVMe lines such as the 9400 and 7450, consumer-facing Crucial SSDs, and UFS 4.0 products. Each party bearing its own costs suggests neither side extracted a clear procedural win. The outcome removes ongoing litigation risk for Micron’s flash storage business, which competes directly with Samsung and SK Hynix in the enterprise SSD segment.

Full product portfolio cleared
Commercial implications

Confidential resolution keeps patent risk live for the broader SSD market

Because the underlying patents US6724241B1 and US6920527B2 remain in force and no court ruled on their validity or scope, other SSD manufacturers face residual exposure. Sonrai Memory and Nera Innovations retain the ability to assert these patents against third parties. Companies shipping competing NVMe and SATA SSD products — particularly those not party to this action — should treat this outcome as a signal to review their own FTO position against both patents.

Third-party risk persists
Legal analysis based on PACER docket records for case 1:23-cv-01407 and PatSnap Eureka litigation intelligence Search PatSnap Eureka ↗
Parties and representation

Full party and counsel information

RoleNameTypeDetail
PlaintiffSonrai Memory, Ltd.CompanyPatent assertion entities — holders of US6724241B1 and US6920527B2 covering flash memory architectureSearch in Eureka ↗
Co-PlaintiffNera Innovations LimitedIndividualSearch in Eureka ↗
DefendantMicron Technology, Inc.CompanyMicron Technology, Inc. — global NAND flash and DRAM manufacturer; maker of Crucial SSD product linesSearch in Eureka ↗
Plaintiff counselAmy HaydenAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselAshley Marie RatyczAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselBrett E. CooperAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselCharles L. AinsworthAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselChristian W. ConkleAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselDrew B. HollanderAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselGlen E. SummersAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselJames MilkeyAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselJohn F. PetrsoricAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselJonathan MaAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselJonathan Randy YimAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselReza MirzaieAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselScott Lamar ColeAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselSeth A. LindnerAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff counselSeth Raymond HasenourAttorneyCounsel for Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff law firmBC Law Group, PCLaw FirmRepresenting Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff law firmBartlit Beck LLPLaw FirmRepresenting Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff law firmParker, Bunt & Ainsworth PCLaw FirmRepresenting Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff law firmRuss August & Kabat LLPLaw FirmRepresenting Sonrai Memory, Ltd.Search in Eureka ↗
Plaintiff law firmSLC Trial Law, PLLCLaw FirmRepresenting Sonrai Memory, Ltd.Search in Eureka ↗
Defendant counselAdam R. ShartzerAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselAhmed J. DavisAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselAlexander Michael PechetteAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselBrian J. LivedalenAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselBryan K. BassoAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselDaniel H. WadeAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselDavid M. HoffmanAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselJacqueline T. MoranAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselJacqueline TioAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselMichael J. BallancoAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant counselTimothy W. RiffeAttorneyCounsel for Micron Technology, Inc.Search in Eureka ↗
Defendant law firmFish & Richardson LLPLaw FirmRepresenting Micron Technology, Inc.Search in Eureka ↗
Presiding judgeJudge Alan D AlbrightJudgeTexas Western District CourtSearch in Eureka ↗
Official verdict

Official order — verbatim text

“On this day, Plaintiffs Sonrai Memory Limited and Nera Innovations Limited (“Plaintiffs”) and Defendant Micron Technology, Inc., (“Defendant”) announced to the Court that they have resolved Plaintiffs’ claims for relief against Defendant asserted in this case. Plaintiffs and Defendant have therefore requested that the Court dismiss Plaintiffs’ claims for relief against Defendant with prejudice, and with all attorneys’ fees, costs and expenses taxed against the party incurring same. The Court, having considered this request, is of the opinion that their request for dismissal should be GRANTED. IT IS THEREFORE ORDERED that Plaintiffs’ claims for relief against Defendant are dismissed with prejudice. IT IS FURTHER ORDERED that all attorneys’ fees, costs of court and expenses shall be borne by each party incurring the same.”
Source: PACER Docket, Case 1:23-cv-01407, Texas Western District Court

The dismissal order reflects a joint resolution rather than any judicial finding on the merits. The with-prejudice designation is legally significant: it carries the same preclusive effect as a final judgment, permanently barring the plaintiffs from reasserting these claims against Micron. The mutual cost-bearing provision — each party responsible for its own fees — is a standard hallmark of negotiated exits and does not indicate which party, if any, received financial consideration. No claim construction ruling, validity finding, or infringement determination was entered, leaving the patents’ scope and enforceability unresolved as against third parties.

PACER case 1:23-cv-01407 · Public docket record Explore in Eureka ↗
Patent at issue

US6724241B1 & US6920527B2 — Flash Memory Architecture and SSD Control Technology

Publication No.US6724241B1
Application No.US10/352733
Patent details
Productflash memory architecture and solid-state drive control circuitry
Cited in actionAugust 16, 2022

Publication No.US6920527B2
Application No.US10/364583
Patent details
Productsolid-state drive memory access and control methods
Cited in actionAugust 16, 2022

US6724241B1 (application No. 10/352733) and US6920527B2 (application No. 10/364583) are utility patents covering flash memory architecture and solid-state drive control technology. Both patents stem from application filings in the early 2000s — a period that predates the mainstream NVMe interface standard but reflects foundational innovations in how flash memory arrays are addressed, managed, and accessed. The technical domain directly intersects with the controller logic at the core of both consumer and enterprise SSD products.

The strategic value of these patents lies in their application to a wide range of flash storage implementations. By asserting them against Micron’s full commercial SSD lineup — from Crucial consumer drives to high-throughput enterprise NVMe products — the plaintiffs demonstrated a reading broad enough to span multiple product generations and interface standards. For competing SSD manufacturers, the continued validity of these patents following the case’s resolution without any court invalidity ruling represents a live IP risk that warrants active monitoring and potential IPR consideration.

Patent data sourced from USPTO via PatSnap Eureka patent database Search patent records in Eureka ↗
Freedom to operate

Should your SSD product team run an FTO against US6724241B1 and US6920527B2?

Any company designing, manufacturing, or selling NAND flash-based storage products — including NVMe SSDs, SATA SSDs, portable SSDs, and UFS devices — should consider whether US6724241B1 and US6920527B2 read on their controller architecture or memory management firmware. This case demonstrates that both patents were construed broadly enough to cover an exceptionally wide product portfolio. The fact that Micron resolved the case without a validity ruling means no prior art finding or claim limitation is on record to narrow the patents’ scope.

PatSnap Eureka’s FTO Search Agent enables IP and R&D teams to map patent claims against specific product architectures, identify prior art candidates for potential IPR petitions, and monitor assertion activity across related patent families. For flash storage teams evaluating NVMe or UFS product roadmaps, running a targeted FTO against both patents — and their cited prior art — is a cost-effective first step before any new product launch or design freeze.

PatSnap Eureka FTO Search

Run a freedom-to-operate analysis on US6724241B1 to assess your product’s exposure

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Related litigation

Similar Flash Storage Patent Cases in W.D. Texas and Related Courts

Explore comparable NVMe and NAND flash patent infringement actions filed in the Western District of Texas targeting SSD manufacturers and memory chip producers.

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Strategic implications

What this case signals for the flash storage IP landscape

A with-prejudice settlement against Micron leaves two live patents that could be turned against the next SSD manufacturer in line.

No validity ruling means the patents survive as enforcement tools

Because the case resolved without a court ruling on claim construction or patent validity, US6724241B1 and US6920527B2 remain legally intact. Other SSD and UFS device manufacturers — particularly those not named in this action — cannot rely on this outcome as any form of invalidity shield. An IPR petition may be the only near-term path to neutralising these patents.

W.D. Texas and Judge Albright: a plaintiff-favourable venue calculus

Filing in the Western District of Texas before Judge Albright remains a deliberate strategy for patent assertion entities targeting large semiconductor defendants. The venue’s historically brisk scheduling and Albright’s docket management can apply settlement pressure on defendants facing costly, time-consuming litigation — a dynamic consistent with this case’s 752-day duration and negotiated exit.

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IPR petition timingClaim scope analysisCo-plaintiff entity risk
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Frequently asked questions

Sonrai v Micron — key questions answered

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US6724241B1 and US6920527B2 remain enforceable against any party not covered by this dismissal. Run a targeted FTO analysis on your SSD or UFS product portfolio and set alerts for new Sonrai Memory and Nera Innovations filings before your next product launch.

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