Introduction

In a swift 119-day enforcement campaign concluded in August 2024, Dyson Technology Limited secured dismissals with prejudice against dozens of online marketplace sellers accused of infringing its registered design patent covering vacuum cleaner battery packs. Filed in the Illinois Northern District Court on April 26, 2024, Case No. 1:24-cv-03399 exemplifies the increasingly aggressive use of “Schedule A” mass-defendant litigation — a courthouse strategy that has become a defining feature of design patent infringement enforcement in the e-commerce era.

The case targeted sellers operating across major online platforms, ranging from obscure storefronts to recognized third-party vendors, all accused of offering counterfeit or infringing battery pack products. For patent attorneys, IP professionals, and R&D teams operating in the consumer electronics and accessories space, this case offers concrete lessons about design patent assertion strategy, marketplace enforcement, and the procedural mechanics that make Schedule A litigation one of the most efficient — and controversial — tools in a patentee’s arsenal.

Case Overview

The Parties

The Patent at Issue

The asserted patent is USD0710299S (application number US29/464509), a U.S. Design Patent covering the ornamental appearance of a **battery pack**. Design patents protect the visual, non-functional aesthetic of a product — in this case, the specific shape, configuration, and design elements of a Dyson-compatible battery unit. Unlike utility patents, design patents require only that an accused product be substantially similar in appearance to an ordinary observer.

The Accused Products

The accused products are **battery pack replacements** — aftermarket units marketed as compatible replacements for Dyson vacuum cleaners. These products, sold through online marketplaces, allegedly copied the protected ornamental design of Dyson’s patented battery pack, creating consumer confusion and potentially undermining Dyson’s accessory market revenue.

Legal Representation

Dyson was represented by **Greer Burns & Crain, Ltd.**, a Chicago-based firm with deep experience in Schedule A e-commerce enforcement litigation. The legal team included attorneys Andrew Daniel Burnham, Justin R. Gaudio, Justin Tyler Joseph, Kahlia Roe Halpern, and Lawrence J. Crain. No defense counsel of record was identified in the case data, which is common in Schedule A actions where defendants often default or settle quickly.

Litigation Timeline & Procedural History

The case was filed in the **Illinois Northern District Court**, a venue that has become a preferred jurisdiction for Schedule A patent and trademark enforcement actions, largely due to its experienced judiciary and established procedural familiarity with multi-defendant e-commerce cases.

Chief Judge **Sara L. Ellis** presided over the matter. The case resolved in approximately four months — a timeline consistent with Schedule A litigation patterns, where the combination of early TRO motions, asset freezes, and settlement pressure often results in rapid resolution without a full trial on the merits.

The compressed timeline reflects the strategic design of Schedule A litigation: file, obtain emergency relief, identify seller identities through platform discovery, and convert defendants to settlements or defaults before significant defense costs accumulate. No appellate proceedings or PTAB challenges were identified in the case data.

The Verdict & Legal Analysis

Outcome

The case closed via **stipulated dismissal with prejudice** as to defendants **CHANJOYH (Def. No. 7)** and **PASHITA US (Def. No. 29)**, following a negotiated settlement executed by the parties. Under the stipulation, each party agreed to bear its own costs and attorneys’ fees — a standard feature of negotiated IP settlements that avoids protracted fee litigation. Specific financial terms of the settlement were not disclosed in the public record.

While the dismissal order names only two defendants explicitly, the broader case involved more than 30 named defendants, indicating that resolution likely occurred on a rolling basis through individual or grouped settlements, defaults, or voluntary dismissals — again consistent with Schedule A litigation mechanics.

Verdict Cause Analysis

The cause of action was **design patent infringement** under 35 U.S.C. § 271, centered on USD0710299S. In design patent cases, the controlling infringement standard is the **ordinary observer test** established in Egyptian Goddess, Inc. v. Swisa, Inc. (Fed. Cir. 2008): whether an ordinary observer, familiar with the prior art, would be deceived into thinking the accused product is the same as the patented design.

No claim construction order, summary judgment ruling, or trial verdict was issued — the case resolved before substantive merits litigation. This is typical in Schedule A actions, where the evidentiary showing required for a temporary restraining order (TRO) and preliminary injunction, combined with the operational disruption of an asset freeze, typically compels defendants to settle rather than litigate.

Legal Significance

While this case does not produce a published opinion establishing precedent, it reinforces several important procedural and strategic realities:

• • Design patents are potent enforcement tools in the aftermarket accessories space, where visual similarity to branded products is commercially significant.
• • Schedule A litigation in the Northern District of Illinois continues to be a high-volume, high-efficiency enforcement vehicle for consumer electronics IP holders.
• • The absence of defense counsel of record across dozens of defendants underscores the asymmetric litigation dynamic that defines these actions.

Industry & Competitive Implications

This case reflects a broader enforcement trend among premium consumer electronics brands targeting the online aftermarket accessories ecosystem. Replacement battery packs represent a recurring revenue stream for OEMs; unauthorized compatible products — even if functionally equivalent — can erode brand value and safety reputation, particularly when they mimic protected designs.

The involvement of numerous sellers with apparent ties to overseas manufacturing highlights the persistent challenge of enforcing U.S. IP rights against distributed, low-visibility marketplace actors. Schedule A litigation has emerged as a structural response to this challenge, enabling plaintiffs to aggregate defendants and judicial resources in a single action.

For companies in the consumer electronics accessories space — including manufacturers, importers, and marketplace sellers — this case signals that design patent enforcement in the battery and power accessory category is active and consequential. Licensing discussions with OEMs, robust FTO clearance, and distinct product designs are essential risk management steps.

The engagement of **Greer Burns & Crain**, a firm with a high-volume Schedule A practice, signals that Dyson’s enforcement in this space is systematic rather than opportunistic — suggesting ongoing monitoring and future actions are probable.