Dyson v. Schedule A Defendants: Hair Styling Design Patent Suit Dismissed Without Prejudice
Dyson Technology Limited brought a design patent infringement action in the Northern District of Illinois against a network of anonymous online sellers, asserting two design patents covering hair styling and hair care apparatus. The case closed after just 93 days when Dyson voluntarily dismissed without prejudice — a resolution that keeps all legal options open.
Dyson’s Schedule A Design Patent Strike: A Surgical Exit
On September 2, 2025, Dyson Technology Limited filed suit in the U.S. District Court for the Northern District of Illinois (Case No. 1:25-cv-10477) against an anonymous group of online sellers identified as ‘The Partnerships and Unincorporated Associations Identified on Schedule A.’ Dyson asserted two design patents — USD0852415S and USD0853642S — covering hair styling and hair care apparatus, targeting defendants operating under the seller handle ‘heilongjiangzhizhuangr0’ on one or more online marketplaces.
The action closed on December 4, 2025, when Dyson voluntarily dismissed the case without prejudice pursuant to Rule 41(a)(1) of the Federal Rules of Civil Procedure. A dismissal without prejudice does not constitute an adjudication on the merits, meaning Dyson preserves the right to refile the same claims against the same defendants. The named sellers face no formal judgment, no injunction, and no damages award arising from this proceeding.
At 93 days, the case resolved significantly faster than a contested Schedule A litigation would typically run — suggesting the parties may have reached a private commercial resolution, the defendants became unreachable, or Dyson elected to pursue enforcement through alternative channels. The public record is silent on the precise driver. No defendant agents or law firms appeared on the docket, consistent with the pattern of default-adjacent outcomes common in Schedule A enforcement campaigns.
Filing to Dismissed without Prejudice in 93 days
93 days — faster than median Schedule A case resolution in N.D. Ill.
Dismissed without prejudice: what the Rule 41 exit means for both parties
Rule 41(a)(1) dismissal: no merits ruling, full optionality preserved
A voluntary dismissal under Rule 41(a)(1) allows a plaintiff to exit a case unilaterally before the defendant files an answer or motion for summary judgment. Because no court has adjudicated the merits, neither the patents’ validity nor the defendants’ alleged infringement has been legally determined. This mechanism is routinely used in Schedule A campaigns when enforcement objectives are met outside the courtroom.
No merits adjudicationWithout prejudice: the distinction that matters for future enforcement
A dismissal ‘without prejudice’ differs materially from one ‘with prejudice.’ Without prejudice means Dyson can refile the identical claims against the same sellers in the future. With prejudice would have barred refiling permanently. The Rule 41 notice in this case explicitly states ‘without prejudice,’ so Dyson’s enforcement rights against heilongjiangzhizhuangr0 remain intact. The public record does not disclose whether any private agreement was reached.
Dyson may refileSellers face no judgment — but remain exposed to future action
The dismissal without prejudice provides the defendants with immediate relief — there is no injunction, no damages award, and no contempt risk arising from this case. However, because the dismissal is without prejudice, the threat of re-litigation persists. Dyson’s design patents USD0852415S and USD0853642S remain in force, and continued sales of accused hair styling products could trigger a new filing.
No judgment enteredSchedule A campaigns: enforcement by attrition in hair care IP
Dyson’s use of the Schedule A ‘John Doe’ mechanism is consistent with a broader enforcement strategy targeting counterfeit and infringing goods on global e-commerce platforms. The rapid 93-day closure — with no defendant appearance — suggests the filing itself may have achieved its deterrent or takedown objective. For other online sellers of hair styling devices, the case signals that Dyson actively monitors and enforces its design patent portfolio against marketplace infringers.
Active design patent enforcementFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Dyson Technology Limited | Individual | Global consumer electronics company — holder of USD0852415S and USD0853642SSearch in Eureka ↗ |
| Defendant | The Partnerships and Unincorporated Associations Identified on Schedule A | Individual | Anonymous online marketplace sellers operating as ‘heilongjiangzhizhuangr0’Search in Eureka ↗ |
| Plaintiff counsel | Andrew Daniel Burnham | Attorney | Counsel for Dyson Technology LimitedSearch in Eureka ↗ |
| Plaintiff counsel | Justin R. Gaudio | Attorney | Counsel for Dyson Technology LimitedSearch in Eureka ↗ |
| Plaintiff counsel | Justin Tyler Joseph | Attorney | Counsel for Dyson Technology LimitedSearch in Eureka ↗ |
| Plaintiff counsel | Lawrence J. Crain | Attorney | Counsel for Dyson Technology LimitedSearch in Eureka ↗ |
| Plaintiff law firm | Greer, Burns & Crain, Ltd. | Law Firm | Representing Dyson Technology LimitedSearch in Eureka ↗ |
| Plaintiff law firm | Husch Blackwell LLP | Law Firm | Representing Dyson Technology LimitedSearch in Eureka ↗ |
| Presiding judge | Judge Sharon Johnson Coleman | Judge | Illinois Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice is narrow and procedurally precise: it names a single seller handle (heilongjiangzhizhuangr0) and invokes Rule 41(a)(1), which requires no court order when filed before a responsive pleading. The phrasing ‘the above captioned case may be terminated’ is standard Rule 41 boilerplate and carries no substantive legal weight beyond confirming closure. No merits findings, no claim construction, and no validity determinations were made. Both Dyson’s design patents remain fully enforceable assets.
USD0852415S & USD0853642S — Hair Styling Apparatus Design Patents
USD0852415S and USD0853642S are U.S. design patents protecting the ornamental appearance of hair styling and hair care apparatus — a product category that encompasses devices such as hair dryers, stylers, and related tools. Both patents originate from application filings US29/627707 and US29/627749 respectively. U.S. design patents protect the aesthetic, non-functional aspects of a product’s visual appearance and carry a term of 15 years from grant, providing strong protection against visually similar competing products in the marketplace.
In the highly competitive consumer hair care device market, design patent protection is strategically significant. Dyson’s premium product line commands substantial price premiums based in part on distinctive industrial design. By securing overlapping design patents on hair styling apparatus, Dyson creates a layered IP barrier that competitors and online counterfeiters must navigate. Any manufacturer or seller offering hair styling devices with a similar overall visual impression faces potential infringement exposure, particularly on global e-commerce platforms where visual similarity to Dyson’s iconic designs is a known commercial risk.
Should you run an FTO check against USD0852415S and USD0853642S?
Any company designing, manufacturing, importing, or selling hair styling or hair care devices — including hair dryers, air stylers, curling tools, or similar apparatus — should assess freedom-to-operate against Dyson’s design patent portfolio. This case demonstrates that Dyson actively monitors and enforces these rights against online sellers, including smaller marketplace vendors. Even ornamental similarities in product shape, housing, or nozzle design can trigger infringement risk under the ‘ordinary observer’ test applied to U.S. design patents.
PatSnap Eureka’s FTO Search Agent can rapidly map the claim scope of USD0852415S and USD0853642S against your product’s design features, identify the priority dates and filing history, and surface related Dyson design patents that may present additional risk. For R&D and product teams working on hair care devices, running this analysis before finalising industrial design decisions is materially cheaper than litigation exposure — particularly in the Northern District of Illinois, where Dyson has demonstrated willingness to file and pursue enforcement actions.
Run a freedom-to-operate analysis on USD0852415S to assess your product’s exposure
Run FTO in Eureka →Similar Design Patent Schedule A Cases in Hair Care & Consumer Devices
Explore comparable Schedule A design patent infringement actions in the Northern District of Illinois targeting hair care and personal care device sellers on online marketplaces.
What this case signals for the hair care device IP landscape
Dyson’s Schedule A enforcement pattern reveals a systematic approach to design patent protection in the competitive hair styling device market.
Schedule A filings function as enforcement tools, not just litigation
The 93-day lifecycle and lack of any defendant appearance strongly suggests Dyson achieved its enforcement goal — likely a platform takedown or seller exit — without a merits ruling. Companies with design-forward product portfolios increasingly use this mechanism as a scalable first-strike tool against anonymous online infringers.
Dismissal without prejudice keeps Dyson’s legal options fully open
Unlike a settlement with a formal release, or a dismissal with prejudice, Dyson faces no legal bar to refiling against these sellers. IP teams monitoring this space should note that the absence of a final judgment does not signal Dyson has abandoned enforcement — the patents remain live and enforceable.
Limited v Partnerships — key questions answered
Dyson Technology Limited filed a design patent infringement action in the Northern District of Illinois on September 2, 2025, asserting USD0852415S and USD0853642S against anonymous online sellers. The case was voluntarily dismissed without prejudice on December 4, 2025, after 93 days, with no merits ruling entered.
Both patents are U.S. design patents protecting the ornamental appearance of hair styling and hair care apparatus. They originate from application numbers US29/627707 and US29/627749 respectively. U.S. design patents protect the visual, non-functional appearance of a product and have a 15-year term from grant date.
A dismissal without prejudice under Rule 41(a)(1) means the case ended without any court ruling on the merits. Dyson retains the right to refile the same patent infringement claims against the same defendants in the future. The defendant sellers face no judgment, injunction, or damages award from this proceeding, but remain exposed to future litigation.
Schedule A cases allow plaintiffs to sue anonymous online marketplace sellers as a group before their identities are fully known, using platform discovery to unmask them. They are commonly filed in the Northern District of Illinois and often paired with TRO motions to freeze seller accounts. Dyson’s 93-day resolution with no defendant appearance is consistent with the enforcement-by-deterrence model typical of these campaigns.
No. A Rule 41(a)(1) voluntary dismissal without prejudice has no effect on patent validity. The patents USD0852415S and USD0853642S were not adjudicated in any way — no claim construction was performed and no invalidity finding was made. Both patents remain in force and enforceable against any party whose products fall within their ornamental scope.
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