Dyson Technology Ltd v. Partnerships Unincorp Associations

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Dyson Technology Limited (United Kingdom)
  • Defendant: valuebattery21 (Jurisdiction unknown, alleged to be People's Republic of China or other foreign jurisdiction)
  • Plaintiff's Counsel: Greer, Burns & Crain, Ltd.
• Case Identification: 1:26-cv-00639, N.D. Ill., 01/22/2026
• Venue Allegations: Venue is based on the defendant allegedly targeting business activities toward consumers in Illinois through a fully interactive e-commerce store, offering shipping to the state, and having sold products to Illinois residents.
• Core Dispute: Plaintiff alleges that Defendant's e-commerce store sells and imports battery packs that infringe a U.S. design patent owned by Plaintiff.
• Technical Context: The dispute is in the consumer electronics accessories market, where the ornamental design of products like battery packs can be a significant driver of brand recognition and consumer choice.
• Key Procedural History: This filing is an Amended Complaint. The complaint alleges that the defendant is part of a larger network of e-commerce operators who use tactics like multiple seller aliases and offshore accounts to conceal their identity and evade enforcement of intellectual property rights.

Case Timeline

Date	Event
2013-02-18	Priority Date for U.S. Patent No. D710,299
2014-08-05	U.S. Patent No. D710,299 Issued
2026-01-22	Complaint Filing Date

II. Technology and Patent(s)-in-Suit Analysis

• Patent Identification: U.S. Patent No. D710,299 ("the '299 Patent"), titled "BATTERY PACK," issued on August 5, 2014.

The Invention Explained

As a design patent, the '299 Patent protects the ornamental appearance of an article of manufacture, rather than its utilitarian function.

• Problem Addressed: The complaint suggests that in the competitive consumer products market, establishing a unique and recognizable product appearance is critical for building brand identity and preventing consumer confusion Compl. ¶¶5, 8 The patent addresses the need for a novel ornamental design for a battery pack.
• The Patented Solution: The patent claims the specific visual appearance of a battery pack as depicted in its seven figures '299 Patent, claim The design consists of a main elongated, rounded body portion and an upright connecting structure that rises from one end '299 Patent, FIG. 1 '299 Patent, FIG. 4 The design as a whole creates a distinctive profile. The patent explicitly notes that elements shown in broken lines are for illustrative purposes only and do not form part of the claimed design, thereby defining the boundaries of the protected ornamental features '299 Patent, description
• Technical Importance: The commercial significance of this type of design is its ability to serve as a source identifier, making genuine products "instantly recognizable" to consumers and associating the product with the quality of the Dyson brand Compl. ¶5 Compl. ¶8

Key Claims at a Glance

• Design patents have a single claim. The '299 Patent claims "the ornamental design for a battery pack, as shown and described" '299 Patent, claim
• This single claim incorporates the entire visual appearance of the battery pack as illustrated in solid lines in Figures 1 through 7 of the patent, covering the design from perspective, front, rear, side, top, and bottom views '299 Patent, description

III. The Accused Instrumentality

• Product Identification: The accused instrumentalities are "Infringing Products," identified as battery packs sold by Defendant under the seller alias "valuebattery21" Compl. ¶3
• Functionality and Market Context: The complaint alleges these are unauthorized and unlicensed battery packs sold through an interactive e-commerce store, potentially on platforms such as Amazon, eBay, Temu, and Walmart Compl. ¶3 Compl. ¶12 The store allegedly targets U.S. consumers, accepts U.S. dollars, and ships to Illinois Compl. ¶14 The complaint frames the defendant as an operator within a network of anonymous online sellers who leverage e-commerce platforms to sell counterfeit or infringing goods directly to consumers, making it difficult for consumers to distinguish them from authorized products Compl. ¶15

IV. Analysis of Infringement Allegations

The complaint does not contain a claim chart exhibit. The infringement allegation is based on a visual comparison between the patented design and the accused products. The complaint asserts that the Defendant is making, using, offering for sale, selling, and/or importing products that infringe the ornamental design claimed in the '299 Patent Compl. ¶24

The core of the infringement case will rely on the "ordinary observer" test, which asks whether an ordinary observer, familiar with prior designs, would be deceived into purchasing the accused product believing it to be the patented design. The complaint includes several figures from the '299 Patent to establish the appearance of the protected "Dyson Design" Compl. pp. 4-7 Figure 1, reproduced in the complaint, provides a perspective view of the patented battery pack design, showing the overall configuration of the upright connecting element and the elongated body Compl. p. 4 Figure 4 of the complaint, corresponding to the patent's side view, highlights the specific contours and proportions of the design's profile Compl. p. 6 The ultimate determination of infringement will depend on a visual comparison between these patented views and the actual products sold by the Defendant.

• Identified Points of Contention:
  • Visual Similarity: The central question will be whether the accused products are "substantially the same" in overall visual appearance as the design claimed in the '299 Patent. This will be a fact-intensive inquiry based on the visual evidence presented.
  • Functionality vs. Ornamentality: A potential point of contention in design patent cases is the distinction between ornamental and functional features. A defendant may argue that similarities between its product and the patented design are dictated by the battery pack's function (e.g., the shape required to interface with a specific device) and therefore should not be considered in the infringement analysis. The court would need to determine which aspects of the '299 Patent's design are purely ornamental and thus protected.

V. Key Claim Terms for Construction

In design patent litigation, "claim construction" involves describing the claimed ornamental design in words to distinguish it from its functional aspects, rather than defining textual terms.

• The Term: "The ornamental design for a battery pack, as shown and described."
• Context and Importance: The construction of the claim is critical for defining the precise scope of the design for the "ordinary observer" test. The court's description will guide the fact-finder on what to compare, focusing their attention on the specific novel, ornamental features protected by the patent, while disregarding functional elements or features disclaimed via broken lines.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: A party seeking a broader scope may argue that the claim protects the overall visual impression and aesthetic effect of the design as a whole, as depicted in the patent figures '299 Patent, FIG. 1 This interpretation would suggest that minor variations should not defeat a finding of infringement if the overall appearance is confusingly similar.
  • Evidence for a Narrower Interpretation: A party seeking a narrower scope may focus on the precise contours, proportions, and surface details shown in the solid lines of the patent drawings '299 Patent, FIG. 4 '299 Patent, FIG. 6 They may also emphasize the disclaimer that "broken lines... form no part of the claimed design" to argue that the patent's protection is strictly limited to the specific combination of solid-line features shown '299 Patent, description

VI. Other Allegations

• Indirect Infringement: While the primary allegation is for direct infringement Compl. ¶24, the prayer for relief also seeks to enjoin the Defendant from "aiding, abetting, contributing to, or otherwise assisting anyone" in making or selling the Infringing Products, suggesting a theory of indirect infringement Prayer for Relief ¶1(b)
• Willful Infringement: The complaint alleges that the Defendant's infringement was "knowingly and willfully" committed Compl. ¶20 Compl. ¶21 This allegation appears to be based on the general assertion of knowing infringement and is further supported by allegations of the Defendant's participation in a broader scheme of using deceptive tactics to conceal its identity and evade detection Compl. ¶¶17-19

VII. Analyst's Conclusion: Key Questions for the Case

1. A question of visual identity: Will an ordinary observer, when comparing the accused "valuebattery21" battery pack to the design claimed in the '299 Patent, find the two to be substantially the same, leading to potential confusion?
2. A question of scope: To what extent are the visual features of the '299 Patent's design ornamental versus dictated by the battery pack's function? The answer will determine the scope of protected features against which the accused product is compared.
3. A question of enforcement: Given the allegations of an anonymous, foreign-based e-commerce operator, a central practical challenge will be whether the plaintiff can successfully identify the defendant, establish personal jurisdiction, and ultimately enforce any resulting judgment or injunction.