Data Resonance v. Ziff Davis (SugarSync): Voluntary Dismissal After 269 Days
Data Resonance, LLC asserted US6934714B2 — a patent covering method and system for identification and maintenance of families of data records — against Ziff Davis’s SugarSync cloud storage service in the Southern District of New York. The case closed via voluntary dismissal without prejudice after 269 days, leaving the door open for future re-filing.
Cloud Storage Patent Suit Against SugarSync Ends Without Merits Decision
Data Resonance, LLC filed Case No. 1:24-cv-10002 in the Southern District of New York on 30 December 2024, asserting infringement of US6934714B2 against Ziff Davis, Inc., operator of the SugarSync cloud storage platform. The asserted patent — titled ‘Method and System for Identification and Maintenance of Families of Data Records’ — relates to organizing and tracking groups of related data records, a capability central to cloud file synchronisation and storage services. Judge Lewis J. Liman was assigned to preside over the matter.
The case closed on 25 September 2025 when the court granted plaintiff’s notice of voluntary dismissal without prejudice. A dismissal without prejudice means the action was terminated on procedural grounds without any ruling on the substantive merits of the infringement or validity claims. Critically, Data Resonance retains the full legal right to refile the same claims against Ziff Davis or SugarSync in the future, subject to applicable statutes of limitations and any subsequent agreements between the parties.
The 269-day duration suggests the case did not advance to claim construction or substantive motion practice before dismissal. Voluntary dismissals at this stage typically reflect settlement negotiations, licensing discussions, or a strategic decision by the plaintiff to reconsider venue or claim scope — though the public record does not disclose the specific driver here. The absence of defendant counsel on record and no recorded cost ruling leaves the full commercial resolution unknown.
Filing to Voluntary dismissal in 269 days
269 days from filing to voluntary dismissal — resolved before claim construction
Voluntarily dismissed: what the without-prejudice order means for both parties
Without prejudice: the case ends, but claims survive
A voluntary dismissal without prejudice under Federal Rule of Civil Procedure 41(a) terminates the current action without adjudicating its merits. The plaintiff’s infringement and any validity challenges are neither decided nor waived. The case is effectively paused rather than concluded — Data Resonance may refile the same claims, subject to statutes of limitations and any tolling agreements negotiated privately.
No merits rulingWithout vs. with prejudice: a consequential difference
A dismissal with prejudice would permanently bar Data Resonance from reasserting US6934714B2 against Ziff Davis on the same claims — effectively a defendant win. A dismissal without prejudice carries no such finality. The public record here confirms ‘without prejudice,’ meaning Ziff Davis has not secured a permanent release. Whether the parties reached any private licensing or covenant-not-to-sue arrangement is not disclosed in the court record.
Plaintiff retains rightsSugarSync faces residual re-filing risk on US6934714B2
Ziff Davis and SugarSync cannot treat this dismissal as a clean resolution. Without a with-prejudice judgment or a disclosed licensing agreement, the infringement allegations under US6934714B2 remain live in principle. If Data Resonance or a successor entity refiles, the case history and any prior art or claim mapping developed during the 269-day pendency could re-enter play. Ziff Davis should consider whether a proactive IPR or ex parte reexamination of US6934714B2 would reduce long-term exposure.
Re-filing risk persistsData management patents remain an active litigation vector for cloud platforms
This case is consistent with a broader pattern of data record organisation and file synchronisation patents being asserted against cloud storage providers. SugarSync’s position as a file-sync platform makes it a plausible target for patents covering data family management logic. Cloud storage operators should audit their synchronisation architecture against US6934714B2 and related family members, particularly given the without-prejudice nature of this dismissal.
Cloud storage IP riskFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Data Resonance, LLC | Company | Patent assertion entity — holder of US6934714B2 covering data record family managementSearch in Eureka ↗ |
| Defendant | Ziff Davis, Inc. (Sugarsync) | Company | Ziff Davis, Inc., operator of SugarSync cloud file synchronisation and storage platformSearch in Eureka ↗ |
| Plaintiff counsel | Isaac Rabicoff | Attorney | Counsel for Data Resonance, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Rabicoff Law LLC | Law Firm | Representing Data Resonance, LLCSearch in Eureka ↗ |
| Presiding judge | Judge Lewis J. Liman | Judge | New York Southern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order granting the plaintiff’s notice of voluntary dismissal without prejudice is a procedural disposition — it reflects no judicial assessment of whether US6934714B2 is infringed or valid. The phrasing ‘SO ORDERED’ confirms the court’s formal acceptance of plaintiff’s unilateral right under Rule 41(a). For Ziff Davis, no collateral estoppel or res judicata protection attaches. Data Resonance’s litigation rights under the patent are fully preserved.
US6934714B2 — Method and System for Data Record Family Management
US6934714B2 covers a method and system for identifying and maintaining families of data records — a technology directed at organising, grouping, and tracking related data objects within a larger dataset. Filed under application number US10/091378, the patent sits within the broader domain of data management and database organisation. Its claims are likely relevant to any software system that dynamically groups, synchronises, or versions sets of related files or records, making it potentially applicable to cloud file-sync platforms, backup systems, and document management services.
For the cloud storage sector, a patent covering data record family management carries meaningful strategic weight. SugarSync’s core functionality — synchronising files across devices and maintaining version histories — is architecturally aligned with the kind of record-grouping logic that such a patent might claim. Competitors to SugarSync, as well as enterprise document management and cloud backup providers, should assess whether their data organisation pipelines fall within the scope of US6934714B2’s claims, particularly given that this case closed without any invalidity ruling.
Should your product team run an FTO against US6934714B2?
Any R&D or product team building cloud storage, file synchronisation, backup, or data versioning systems that organise files or records into related groups should consider a freedom-to-operate assessment against US6934714B2. The without-prejudice dismissal in this case means the patent remains fully enforceable and has not been tested for validity through litigation. The risk is particularly acute for platforms whose core architecture involves dynamic grouping or family tracking of data objects.
PatSnap Eureka’s FTO Search Agent allows IP and R&D teams to map product features against claim language in US6934714B2 and surface related patents in the same family. Eureka can identify continuation applications, divisional patents, and similar granted patents that may broaden the assertion risk landscape — enabling legal teams to scope a comprehensive clearance opinion before a potential refile or parallel assertion materialises.
Run a freedom-to-operate analysis on US6934714B2 to assess your product’s exposure
Run FTO in Eureka →Similar Data Management Patent Cases in Federal District Courts
Browse analogous data record management and cloud storage infringement cases filed in federal district courts, including the Southern District of New York.
What this case signals for the cloud storage and data management IP landscape
A without-prejudice exit leaves legal uncertainty intact — and sets up potential re-engagement around US6934714B2.
Without-prejudice dismissals are not safe harbours for defendants
Ziff Davis secured no formal release or invalidity ruling. Cloud and SaaS platforms named in similar data-management patent suits should treat a voluntary dismissal without prejudice as a pause, not a resolution. Proactive prior art searches and IPR petitions against the asserted patent are often more cost-effective than waiting for a refile.
US6934714B2 remains enforceable and ripe for FTO analysis
The patent was not challenged to invalidity through this litigation. Any company operating file synchronisation, cloud backup, or data versioning services that organises records into logical families should run a freedom-to-operate analysis against US6934714B2 and check for continuation or divisional patents in its family.
Data v Ziff — key questions answered
The case was voluntarily dismissed without prejudice on 25 September 2025. Judge Lewis J. Liman granted plaintiff Data Resonance’s notice of voluntary dismissal. No merits ruling was issued on infringement or validity of US6934714B2. Data Resonance retains the right to refile the same claims against Ziff Davis in the future.
A voluntary dismissal without prejudice means the current action is terminated but no permanent bar attaches. Ziff Davis did not obtain a judgment of non-infringement or invalidity. Data Resonance may refile the infringement claims under US6934714B2 in the future. Ziff Davis should evaluate whether to pursue inter partes review of the patent to reduce long-term exposure.
US6934714B2 covers a method and system for identification and maintenance of families of data records — technology relating to organising and tracking groups of related data objects. SugarSync is a cloud file synchronisation service, and its core functionality of grouping and syncing related files across devices is architecturally consistent with the type of record-family management the patent claims to cover.
Yes. A dismissal without prejudice expressly preserves the plaintiff’s right to refile. Data Resonance may bring a new action asserting US6934714B2 against Ziff Davis or its SugarSync platform, subject to applicable statutes of limitations. Whether any private agreement — such as a covenant not to sue — limits that right is not disclosed in the public record.
Data Resonance LLC was represented by Rabicoff Law LLC, with Isaac Rabicoff listed as plaintiff’s agent. No defendant law firm or agent is recorded on the public docket, which may suggest Ziff Davis did not file a formal appearance before the case was dismissed — consistent with early-stage resolution.
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