Longhorn HD v. Synology: Dismissed With Prejudice After 300 Days
Longhorn HD LLC filed suit against Synology Inc. in the Eastern District of Texas asserting two storage-technology patents covering information backup systems and removable hard drive assemblies. The parties jointly moved to dismiss the case with prejudice after just 300 days, with each side bearing its own costs.
Two storage patents, one joint dismissal, and no public resolution terms
On 30 December 2022, Longhorn HD LLC filed an infringement action against Synology Inc. in the Eastern District of Texas (Case No. 2:22-cv-00500), asserting US8725924B2, directed to an information backup system with a storing mechanism, and US6938104B2, directed to a removable hard drive assembly and related initialisation methods. Synology, a Taiwan-based NAS and storage solutions company, was the sole defendant. The case was prosecuted by Fabricant LLP and associated Rubino-firm counsel, with Perkins Coie LLP defending.
The recorded basis of termination is 'Dismissed with Prejudice.' The docket order states that the parties filed a Joint Motion to Dismiss representing that the case 'has been resolved,' and the court granted the motion, dismissing all claims and causes of action with prejudice. Each party was ordered to bear its own costs, expenses, and attorneys' fees. The specific terms of whatever resolution the parties reached are not disclosed in the available record.
Resolution in 300 days is notably swift for an E.D. Texas patent infringement action, suggesting the parties reached agreement before substantial merits litigation or claim construction proceedings concluded. What drove that timeline — whether claim strength, cost calculus, or a separate commercial arrangement — is not reflected in the public record. The with-prejudice dismissal bars Longhorn HD from re-asserting the same claims against Synology on the same patents in future proceedings.
See Complete Case & Patent Analysis →Filing to Dismissed with Prejudice in 300 days
300 days from filing to dismissal — resolved well short of typical E.D. Texas trial timelines
US8725924B2 & US6938104B2 — Information Backup and Removable Drive Technology
Any company developing or selling NAS appliances, network backup systems, hot-swap storage enclosures, or removable drive management solutions should assess freedom-to-operate against both patents. The absence of a merits ruling in this case means there is no publicly available claim construction or invalidity finding to rely on. R&D and product teams launching or updating backup-system firmware, drive-bay management modules, or storage initialisation workflows are the primary audience for this analysis.
Official order — verbatim text
The court's dismissal order is purely procedural in scope: it grants the joint motion, dismisses all claims with prejudice, and directs each party to bear its own costs. The order contains no findings on infringement, validity, or claim construction. The parties' representation that the case 'has been resolved' is noted but no resolution terms are set out in the order or in the available public record.
Dismissed with prejudice: what the joint resolution means for both parties
With-prejudice dismissal bars future re-filing on these patents
A dismissal with prejudice is a final adjudication on the merits for preclusion purposes. Because the dismissal here was joint and entered on the parties' own representation that the case 'has been resolved,' Longhorn HD cannot re-file the same infringement claims against Synology on US8725924B2 or US6938104B2. The court retained no jurisdiction and awarded no damages — the record is otherwise silent on underlying terms.
Final, bars re-filingLonghorn HD loses right to pursue Synology again on these two patents
The with-prejudice dismissal extinguishes Longhorn HD's ability to reassert US8725924B2 and US6938104B2 against Synology in U.S. federal court. Whether any value was exchanged in the underlying resolution is not disclosed. The patents themselves remain in force and could theoretically be asserted against other defendants in separate proceedings, subject to their remaining term.
Patents survive; Synology claim closedSynology achieves certainty — no live infringement claims on these patents
Synology obtains finality: Longhorn HD's infringement allegations relating to its backup and removable storage products are permanently extinguished as against Synology. The cost-bearing order — each party its own fees — means Synology recovered no attorneys' fees through the litigation. Whether any operational or commercial terms accompanied the resolution is not reflected in the public docket.
Full certainty; no fee recoveryNAS and backup storage vendors should monitor Longhorn HD's remaining enforcement activity
US8725924B2 and US6938104B2 remain active patents that could be directed at other storage and NAS vendors. The rapid resolution of this case — 300 days, with-prejudice, own costs — is consistent with a pre-trial resolution but provides no public signal on claim validity or infringement scope. Competitors in the NAS and backup-storage segment should assess freedom-to-operate against both patents independently.
Watch Longhorn HD portfolio activityFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Longhorn HD, LLC | Company | /Search in Eureka ↗ |
| Defendant | Synology, Inc. | Company | /Search in Eureka ↗ |
| Plaintiff counsel | John Andrew Rubino | Attorney | Counsel for Longhorn HD, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Justin Kurt Truelove | Attorney | Counsel for Longhorn HD, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Michael Mondelli , III | Attorney | Counsel for Longhorn HD, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Vincent J. Rubino , III | Attorney | Counsel for Longhorn HD, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Fabricant LLP (NY) | Law Firm | Representing Longhorn HD, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Rubino Ip | Law Firm | Representing Longhorn HD, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Rubino Law LLC | Law Firm | Representing Longhorn HD, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Truelove Law Firm | Law Firm | Representing Longhorn HD, LLCSearch in Eureka ↗ |
| Defendant counsel | Eric Maas | Attorney | Counsel for Synology, Inc.Search in Eureka ↗ |
| Defendant counsel | Jennifer Parker Ainsworth | Attorney | Counsel for Synology, Inc.Search in Eureka ↗ |
| Defendant counsel | Matthew C. Bernstein | Attorney | Counsel for Synology, Inc.Search in Eureka ↗ |
| Defendant counsel | Wei Yuan | Attorney | Counsel for Synology, Inc.Search in Eureka ↗ |
| Defendant law firm | Perkins Coie LLP | Law Firm | Representing Synology, Inc.Search in Eureka ↗ |
| Defendant law firm | Perkins Coie LLP (San Diego) | Law Firm | Representing Synology, Inc.Search in Eureka ↗ |
| Defendant law firm | Wilson, Robertson & Vandeventer, PC | Law Firm | Representing Synology, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
R&D signals in the NAS and storage IP space
Forward-looking patent and innovation intelligence derived from Longhorn HD v. Synology — relevant to NAS vendors, backup-system developers, and storage IP teams.
Longhorn HD's storage patent portfolio beyond these two assertions
Longhorn HD's simultaneous assertion of both a backup-system architecture patent and a removable drive assembly patent points to a portfolio with layered coverage across storage product stacks. Understanding the full scope of Longhorn HD's holdings — including any continuations or divisionals of US8725924B2 and US6938104B2 — is essential for NAS vendors assessing future enforcement exposure.
Longhorn HD portfolio depthFiling trends in network-attached storage and backup system patents
The NAS and network backup space continues to see active patent filing activity, particularly around cloud-integrated backup architectures and hot-swap drive management. Tracking filing trends in this domain helps vendors anticipate where new assertion risk is developing — especially as legacy hardware patents intersect with modern software-defined storage implementations.
NAS backup IP filing trendsSynology's own patent portfolio in the NAS and storage domain
As a defendant in this action, Synology's internal patent portfolio in the NAS, storage, and backup space is worth mapping for competitors and partners alike. Understanding Synology's own IP filings — particularly in drive management, backup protocols, and storage OS architecture — provides context on its defensive and offensive IP posture in this market segment.
Synology IP postureAdjacent innovation opportunities near removable drive initialisation methods
US6938104B2's coverage of removable drive assembly initialisation suggests potential white space around modern equivalents: NVMe hot-plug management, software-defined drive initialisation in containerised environments, and edge-storage modular architectures. These areas may represent filing opportunities or freedom-to-operate corridors for storage hardware and firmware innovators.
Removable drive innovation gapsSimilar NAS and storage patent infringement cases in E.D. Texas
Browse comparable patent infringement actions asserting storage, backup-system, and removable-drive technology patents before the Eastern District of Texas.
What this case signals for the NAS and storage IP landscape
A 300-day with-prejudice exit in E.D. Texas suggests early resolution pressure — but leaves patent enforceability unresolved for the broader market.
With-prejudice dismissal creates no invalidity shield for other defendants
Because this case ended by joint motion before any substantive merits ruling, there is no claim construction order, invalidity finding, or prosecution history estoppel that other NAS or backup-storage vendors can rely on. Each potential defendant would face the patents fresh. Monitoring Longhorn HD's docket activity across districts is advisable.
E.D. Texas remains a favoured venue for storage patent assertions — Perkins Coie defence model is instructive
Synology deployed a multi-firm defence team anchored by Perkins Coie. The swift resolution suggests early engagement strategy can compress timelines significantly. Companies holding NAS or backup-system product lines should assess whether their FTO position covers both asserted patents before receiving a demand letter.
Longhorn v Synology — key questions answered
The case was dismissed with prejudice by order of the Eastern District of Texas on 26 October 2023. The parties filed a joint motion to dismiss representing that the case had been resolved. The court granted the motion and ordered each party to bear its own costs, expenses, and attorneys' fees. The specific terms of the resolution are not disclosed in the public record.
Longhorn HD asserted two patents: US8725924B2, relating to an information backup system with a storing mechanism and method of operation, and US6938104B2, relating to a removable hard disk drive assembly, computers incorporating such assemblies, and methods of initialising and operating removable hard drives. Both patents remained in force through the dismissal.
A dismissal with prejudice is a final disposition that bars Longhorn HD from re-filing the same infringement claims against Synology on US8725924B2 and US6938104B2 in U.S. federal court. Longhorn HD retains the patents and could assert them against other defendants, but the claims against Synology are permanently extinguished.
No. Because the case ended before any merits ruling, there is no claim construction order, invalidity finding, or other judicial determination that third parties could rely on. Other NAS, backup-storage, or removable-drive-product vendors would face these patents fresh in any future enforcement action. An independent FTO analysis is advisable for companies in the relevant product categories.
The case was filed in the Eastern District of Texas (Marshall Division), a jurisdiction historically favoured by patent assertion entities for its established patent litigation docket and procedural familiarity. The 300-day duration from filing to dismissal is notably short relative to typical E.D. Texas timelines, suggesting the parties reached agreement early in the pre-trial phase.
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