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.
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.
Filing to Dismissed with Prejudice in 752 days
752 days — notably longer than the W.D. Texas median for settled patent cases
Dismissed with prejudice: what the final order means for both parties
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 extinguishedPlaintiffs 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 disclosedMicron 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 clearedConfidential 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 persistsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Sonrai Memory, Ltd. | Company | Patent assertion entities — holders of US6724241B1 and US6920527B2 covering flash memory architectureSearch in Eureka ↗ |
| Co-Plaintiff | Nera Innovations Limited | Individual | Search in Eureka ↗ |
| Defendant | Micron Technology, Inc. | Company | Micron Technology, Inc. — global NAND flash and DRAM manufacturer; maker of Crucial SSD product linesSearch in Eureka ↗ |
| Plaintiff counsel | Amy Hayden | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Ashley Marie Ratycz | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Brett E. Cooper | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Charles L. Ainsworth | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Christian W. Conkle | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Drew B. Hollander | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Glen E. Summers | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | James Milkey | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | John F. Petrsoric | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Jonathan Ma | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Jonathan Randy Yim | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Reza Mirzaie | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Scott Lamar Cole | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Seth A. Lindner | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Seth Raymond Hasenour | Attorney | Counsel for Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | BC Law Group, PC | Law Firm | Representing Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Bartlit Beck LLP | Law Firm | Representing Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Parker, Bunt & Ainsworth PC | Law Firm | Representing Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Russ August & Kabat LLP | Law Firm | Representing Sonrai Memory, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | SLC Trial Law, PLLC | Law Firm | Representing Sonrai Memory, Ltd.Search in Eureka ↗ |
| Defendant counsel | Adam R. Shartzer | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Ahmed J. Davis | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Alexander Michael Pechette | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Brian J. Livedalen | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Bryan K. Basso | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Daniel H. Wade | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | David M. Hoffman | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Jacqueline T. Moran | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Jacqueline Tio | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Michael J. Ballanco | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Timothy W. Riffe | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant law firm | Fish & Richardson LLP | Law Firm | Representing Micron Technology, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Alan D Albright | Judge | Texas Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
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.
US6724241B1 & US6920527B2 — Flash Memory Architecture and SSD Control Technology
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.
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.
Run a freedom-to-operate analysis on US6724241B1 to assess your product’s exposure
Run FTO in Eureka →Similar Flash Storage Patent Cases in W.D. Texas and Related Courts
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DecidedSonrai Memory, Ltd.’s broader IP enforcement history
Sonrai Memory, Ltd.’s full litigation history covering prior enforcement, licensing activity, and inter partes review proceedings.
Portfolio viewWhat 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.
Claim mapping across Micron’s full NVMe stack suggests broad reading
The breadth of accused products — spanning entry-level consumer SATA drives through enterprise NVMe and UFS 4.0 — suggests the plaintiffs read the asserted claims broadly across NAND controller architectures. Any competitor shipping similar controller logic or memory management firmware should conduct independent claim mapping before assuming design freedom.
Portfolio aggregation pattern: Sonrai and Nera as linked assertion vehicles
The co-plaintiff structure of Sonrai Memory and Nera Innovations is consistent with a coordinated patent monetisation model where rights are split across entities to complicate IPR standing and consolidation. Companies evaluating whether to challenge these patents must map the ownership chain carefully — a challenge to one entity’s standing may not neutralise the other’s enforcement rights.
Sonrai v Micron — key questions answered
The case was dismissed with prejudice on 6 September 2024, following a joint request by Sonrai Memory Ltd., Nera Innovations Limited, and Micron Technology, Inc. The dismissal permanently bars the plaintiffs from reasserting the same claims against Micron. Each party bears its own attorneys’ fees, costs, and expenses. No damages figure or licensing terms were disclosed in the public record.
The plaintiffs asserted two patents: US6724241B1 (application No. 10/352733) and US6920527B2 (application No. 10/364583). Both patents relate to flash memory architecture and solid-state drive control technology. They were asserted against more than 24 Micron and Crucial-branded SSD and UFS 4.0 products.
A dismissal with prejudice is a final judgment on the merits. It permanently extinguishes the plaintiff’s right to refile the same claims against the same defendant in any future action. In patent cases, this means the asserted infringement claims are permanently barred as against Micron. Unlike a without-prejudice dismissal, the plaintiffs cannot revive the action. The underlying patents remain valid and enforceable against other parties.
Not directly. The dismissal is specific to claims against Micron and carries no preclusive effect on third parties. Because no court ruled on the validity or scope of US6724241B1 or US6920527B2, the patents remain fully enforceable. Other SSD, NVMe, and UFS device manufacturers cannot rely on this outcome as any form of invalidity defence and should conduct independent freedom-to-operate analysis.
The Western District of Texas, and Judge Albright’s court in particular, has been a preferred venue for patent assertion entities due to its historically favourable case management approach, brisk scheduling orders, and plaintiff-friendly reputation. These factors can accelerate time-to-trial and apply settlement pressure on large defendants with complex product portfolios. The choice is consistent with a deliberate forum selection strategy common among patent monetisation plaintiffs.
Stay ahead of flash storage patent risk with PatSnap Eureka
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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