Hexin Holdings Ltd v. Partnerships Unincorp Associations

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Hexin Holding Limited (Hong Kong)
  • Defendant: KSDMNFFE and the Individual and/or Entity Operating KSDMNFFE (Foreign Jurisdiction)
  • Plaintiff's Counsel: YK Law LLP
• Case Identification: 1:26-cv-03432, N.D. Ill., 04/07/2026
• Venue Allegations: Venue is asserted on the basis that Defendant is a foreign entity engaged in infringing activities, including selling and offering to sell products to consumers, within the judicial district.
• Core Dispute: Plaintiff alleges that Defendant's shapewear products, sold through online e-commerce stores, infringe a design patent for a corset belt.
• Technical Context: The dispute is in the women's shapewear market, a competitive consumer goods sector where product appearance is a key driver of sales.
• Key Procedural History: The complaint frames this action as part of a broader effort to combat online e-commerce operators who allegedly use aliases to conceal their identities and sell infringing products. Plaintiff alleges Defendant is one such operator.

Case Timeline

Date	Event
2021-08-30	U.S. Design Patent No. D981,078 Priority Date
2023-03-21	U.S. Design Patent No. D981,078 Issues
2026-04-07	Complaint Filed

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

U.S. Design Patent No. D981,078 - "Corset Belt"

• Patent Identification: U.S. Design Patent No. D981,078, "Corset Belt," issued March 21, 2023.

The Invention Explained

The patented design claims the ornamental design for a corset belt D'078 Patent, claim The design, depicted in the patent's figures, consists of an elongated, wraparound band D'078 Patent, FIG. 1 D'078 Patent, FIG. 8 The figures show a band with straight top and bottom edges and a surface texture that suggests multiple horizontal segments, with a small section featuring a different texture or fastening mechanism D'078 Patent, FIG. 2 The broken lines in the figures indicate that the sewing thread forms part of the claimed design, while the mannequin shown in Figure 8 is for environmental context only and does not form part of the design D'078 Patent, description

The complaint alleges that products embodying the patented design are recognized by consumers and associated exclusively with the Plaintiff due to significant marketing and promotional efforts Compl. ¶¶8-9

Key Claims at a Glance

The patent contains a single claim: "The ornamental design for a corset belt, as shown and described." D'078 Patent, claim

III. The Accused Instrumentality

Product Identification

The accused instrumentalities are "Infringing Products," identified as shapewear sold by Defendant through "Internet based e-commerce stores" Compl. ¶1

Functionality and Market Context

The complaint alleges Defendant advertises and sells shapewear products that feature Plaintiff's patented design Compl. ¶19 These products are allegedly sold through online storefronts operating under aliases to conceal the seller's identity Compl. ¶1 Compl. ¶18

Plaintiff alleges that these e-commerce sales have resulted in a "sharp increase in sales for those stores unlawfully using" the patented design Compl. ¶19

No probative visual evidence provided in complaint.

IV. Analysis of Infringement Allegations

The complaint does not provide a claim chart or detailed breakdown of infringement. It makes a general allegation that Defendant sells, offers for sale, and/or imports products that "infringe upon the Hexin Design" Compl. ¶28 In design patent cases, the legal test for infringement is whether an "ordinary observer," familiar with the prior art, would be deceived into purchasing the accused product, believing it to be the patented design.

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 D'078 Patent. This will involve a side-by-side comparison of the accused products with the figures in the D'078 Patent.
• Scope Questions: A potential issue is whether the overall design of the accused shapewear is sufficiently different from the patented design to avoid infringement in the eyes of an ordinary observer. The analysis would consider the entire visual impression, not just isolated features.

V. Key Claim Terms for Construction

The complaint does not provide sufficient detail for analysis of claim construction. Unlike utility patents, design patent claims are defined by the drawings rather than textual limitations. The scope of the claim is "the ornamental design for a corset belt, as shown and described" D'078 Patent, claim As such, there are no specific claim terms whose construction is likely to be a central point of dispute in the same manner as a utility patent case. The dispute will likely focus on the application of the "ordinary observer" test to the accused products rather than the definition of any particular term.

VI. Other Allegations

Indirect Infringement

The complaint does not contain specific allegations of indirect infringement (inducement or contributory infringement).

Willful Infringement

The complaint does not explicitly plead willful infringement or seek enhanced damages under 35 U.S.C. § 284 in the body of the complaint, although a request for treble damages is included in the prayer for relief Prayer for Relief ¶4 The complaint alleges, "on information and belief, Defendant is aware of Hexin Products, and is aware that its illegal infringing actions alleged herein are likely to cause injury to Plaintiff" Compl. ¶16 This allegation may be used to support a future claim of willfulness.

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

1. Evidentiary Proof: A primary issue will be an evidentiary one: can the Plaintiff present sufficient evidence to demonstrate that the accused products sold by the largely anonymous Defendant are, in fact, substantially similar in appearance to the design claimed in the D'078 Patent, from the perspective of an ordinary observer?
2. Enforcement Practicality: A second core issue is one of enforcement: given that the Defendant is alleged to be a foreign entity operating under aliases to conceal its identity Compl. ¶1 Compl. ¶18, what practical ability will the Plaintiff have to enforce any monetary judgment or permanent injunction that may be awarded by the court?