Dyson Technology Ltd v. Schedule A Defendants (1:25-cv-01699)
Dyson Technology Limited brought a design patent infringement action in the Northern District of Illinois against anonymous online sellers operating as CNXNAH, asserting two design patents covering hair styling and hair care apparatus. The case closed after 124 days via a voluntary dismissal without prejudice under Rule 41(a)(1).
Dyson’s Schedule A design patent sweep hits CNXNAH, then steps back
On 19 February 2025, Dyson Technology Limited filed suit in the U.S. District Court for the Northern District of Illinois against a class of anonymous defendants — The Partnerships and Unincorporated Associations Identified on Schedule A — targeting those operating under the CNXNAH storefront. The asserted patents, USD852415S (application no. US29/627707) and USD853642S (application no. US29/627749), protect the ornamental design of Dyson’s hair styling and hair care apparatus, product lines that command significant premium positioning in the consumer electronics market.
On 23 June 2025, Dyson filed a Rule 41(a)(1) notice of voluntary dismissal without prejudice as to CNXNAH and the individuals and entities operating that storefront. Without prejudice means the dismissal does not constitute a judgment on the merits: Dyson is not barred from reasserting these same design patent claims against the same defendants in a future action. No defendant counsel of record appeared, and no court order was required to effectuate the dismissal at this procedural stage.
The 124-day arc from filing to dismissal is typical of Schedule A enforcement campaigns, where plaintiffs use ex parte temporary restraining orders and asset freezes to pressure anonymous sellers before reassessing whether identified defendants warrant continued litigation. The public record does not disclose whether a settlement, licensing arrangement, or inability to serve the defendants drove the dismissal decision, leaving the commercial resolution — if any — opaque.
Filing to Dismissed without Prejudice in 124 days
124 days — closed before trial, consistent with early-stage enforcement actions against anonymous marketplace defendants
Dismissed without prejudice: what Dyson’s Rule 41 exit means for both sides
Rule 41(a)(1) lets Dyson exit cleanly — and return
A Rule 41(a)(1) voluntary dismissal without prejudice requires no court approval when filed before the defendant serves an answer or motion for summary judgment. Because no defendant counsel appeared here, Dyson could dismiss unilaterally. ‘Without prejudice’ is the operative phrase: the action is terminated but the underlying design patent claims are preserved in full — Dyson faces no issue preclusion or claim preclusion from this exit.
No merits adjudicationWithout prejudice keeps Dyson’s options open
A dismissal ‘with prejudice’ would permanently bar Dyson from re-suing CNXNAH on these patents — effectively a win for the defendants. ‘Without prejudice’ carries no such bar. Dyson retains the right to refile the same claims against the same parties in any competent forum. The public docket is silent on whether any private resolution was reached; what is known is only that the formal action ended without a merits ruling.
Refiling right preservedCNXNAH faces no permanent shield from Dyson’s design patents
The dismissal without prejudice provides CNXNAH operators no lasting legal protection. They cannot invoke res judicata or claim preclusion if Dyson refiles. Any asset freeze or TRO entered during the 124-day pendency would have been dissolved upon dismissal, but the underlying design patent risk remains live. Sellers in the consumer hair care space operating similar storefronts should treat this outcome as a tactical pause, not a clearance.
No legal clearance grantedSchedule A tactics signal sustained Dyson enforcement pressure
Dyson’s use of anonymous Schedule A complaints is consistent with a systematic marketplace enforcement programme targeting counterfeit or design-infringing hair appliance sellers on e-commerce platforms. A without-prejudice exit against one storefront does not signal retreat: it typically reflects defendant identification difficulties or a private resolution. Online sellers and importers of Dyson-adjacent hair styling devices should expect continued enforcement activity across USD852415S and USD853642S.
Enforcement programme ongoingFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Dyson Technology Limited | Individual | Consumer electronics and personal care IP licensor — holder of USD852415S and USD853642SSearch in Eureka ↗ |
| Defendant | The Partnerships and Unincorporated Associations Identified on Schedule A | Individual | Anonymous online marketplace sellers operating the CNXNAH storefront; no counsel of recordSearch 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 ↗ |
| Presiding judge | Judge LaShonda A. Hunt | Judge | Illinois Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1)(A)(i), the self-executing mechanism available to a plaintiff before a responsive pleading is served. The phrasing ‘may be terminated’ is standard boilerplate confirming administrative closure without any finding on the merits of the design patent infringement claims. No liability was established, no damages were assessed, and neither USD852415S nor USD853642S was adjudicated valid or invalid. Both patents remain fully enforceable.
USD852415S & USD853642S — Hair Styling and Hair Care Apparatus Designs
USD852415S (application no. US29/627707) and USD853642S (application no. US29/627749) are U.S. design patents protecting the ornamental appearance of Dyson’s hair styling and hair care apparatus. Design patents protect the way a product looks — not how it works — and infringement is assessed under the ‘ordinary observer’ test: whether an ordinary purchaser would be deceived into believing the accused product is the same as the patented design. Dyson’s hair appliance portfolio, anchored by the Supersonic and Airwrap product lines, carries significant brand equity tied directly to distinctive visual design.
Two separate design applications suggest Dyson sought to capture distinct ornamental variations across its hair care range, creating a layered design protection strategy that is harder for competitors to design around with a single modification. In the crowded personal care appliance market — where copycat products proliferate on Amazon, eBay, and AliExpress — design patents are a primary enforcement tool. Any company manufacturing, importing, or distributing hair dryers, stylers, or related devices with visual similarities to Dyson’s protected designs faces meaningful infringement risk under both patents.
Should your product team run an FTO against USD852415S and USD853642S?
If your organisation designs, sources, or distributes hair styling or hair care appliances — particularly for sale on online marketplaces — both USD852415S and USD853642S are material to your freedom-to-operate position. Dyson has demonstrated willingness to file in the Northern District of Illinois and to pursue anonymous marketplace sellers aggressively. The without-prejudice dismissal in this case confirms the patents remain live enforcement assets. R&D and product teams should assess ornamental similarity before finalising industrial design choices for any personal care appliance.
PatSnap Eureka’s FTO Search Agent can map the ornamental claim scope of both design patents, surface the prosecution history for each application number, and identify design-around prior art in the hair appliance category. Eureka’s patent landscape tools allow in-house IP teams to benchmark Dyson’s design coverage against competing registrations and to monitor new filings from Dyson’s portfolio in real time — a critical capability given Dyson’s pattern of filing multiple related design applications across a single product generation.
Run a freedom-to-operate analysis on USD0852415S to assess your product’s exposure
Run FTO in Eureka →Similar design patent cases: hair care and consumer appliance enforcement
Cases involving design patent enforcement against Schedule A defendants in the Northern District of Illinois for consumer hair care and personal appliance products.
What this case signals for the consumer hair care IP landscape
Dyson’s Schedule A strategy in the Northern District of Illinois is an established enforcement template — this case reveals how it operates and where it leaves gaps.
Schedule A filings are volume tools, not one-off actions
Dyson’s use of anonymous Schedule A defendants in the Northern District of Illinois reflects a systematic approach to e-commerce enforcement. A single without-prejudice dismissal should be read as a data point in a broader campaign, not as abandonment of the asserted design patents USD852415S or USD853642S.
Without-prejudice exits preserve future enforcement leverage
Competitors and marketplace sellers should not interpret a Rule 41(a)(1) dismissal without prejudice as a design patent clearance. Dyson retains the right to refile on both patents. Companies sourcing or distributing hair styling apparatus with similar ornamental design features face ongoing infringement exposure.
Limited v Partnerships — key questions answered
Dyson Technology Limited asserted two design patents — USD852415S (application US29/627707) and USD853642S (application US29/627749) — covering the ornamental design of hair styling and hair care apparatus against anonymous online sellers operating as CNXNAH in the Northern District of Illinois.
The public docket does not disclose the specific reason. A Rule 41(a)(1) voluntary dismissal without prejudice requires no court approval at this procedural stage and is commonly used in Schedule A enforcement when a plaintiff has achieved a private resolution, encountered service difficulties, or decided to reassess litigation strategy. Dyson retains the right to refile.
No. A dismissal without prejudice carries no merits determination. Neither USD852415S nor USD853642S was found valid or invalid, and no non-infringement finding was made. CNXNAH operators cannot rely on this dismissal as a legal defence if Dyson refiles the same claims.
Schedule A complaints allow plaintiffs to sue anonymous groups of online sellers without knowing their identities at filing. Courts in the Northern District of Illinois regularly grant ex parte TROs and asset freezes in these cases, which can freeze marketplace accounts and payment processors rapidly — creating settlement pressure before any merits ruling. This approach is common in consumer electronics design patent enforcement.
The case was filed in and handled by the U.S. District Court for the Northern District of Illinois, assigned to Judge LaShonda A. Hunt. It was filed on 19 February 2025 and closed on 23 June 2025 after 124 days, ending on Dyson’s voluntary dismissal without prejudice.
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