1:26-cv-26499
Tongxiang Simai Trading Co Ltd v. Partnerships Unincorp Associations
I. Executive Summary and Procedural Information
- Parties & Counsel:
- Plaintiff: Tongxiang Simai Trading Co., Ltd. (People's Republic of China)
- Defendant: The Partnerships, Unincorporated Associations Identified on Schedule A (People's Republic of China)
- Plaintiff’s Counsel: Palmer Law Group, P.A.
- Case Identification: 1:26-cv-26499, S.D. Fla., 09/21/2026
- Venue Allegations: Venue is asserted on the basis that Defendants have committed acts of patent infringement in the district and conduct substantial business there by targeting and selling products to consumers in Florida through interactive e-commerce stores.
- Core Dispute: Plaintiff alleges that numerous e-commerce store operators, identified on Schedule A, are infringing a U.S. design patent for a lint remover by selling visually similar products.
- Technical Context: The dispute centers on the ornamental design of a consumer product, a lint remover, where the aesthetic appearance is presented as a key market differentiator and source of consumer recognition.
- Key Procedural History: The case is structured as a "Schedule A" action, targeting a large number of allegedly related e-commerce operators who are accused of using concealment tactics. This procedural posture is common in actions against diffuse online sellers, often based overseas, who are alleged to be part of a single coordinated infringement network.
Case Timeline
| Date | Event |
|---|---|
| 2025-01-15 | D'130 Patent Priority Date (Filing) |
| 2025-06-10 | D'130 Patent Issue Date |
| 2026-09-21 | Complaint Filing Date |
II. Technology and Patent(s)-in-Suit Analysis
U.S. Design Patent No. D1,079,130 - Lint Remover
The patent-in-suit is U.S. Design Patent No. D1,079,130 (the "D'130 Patent"), issued June 10, 2025.
The Invention Explained
- Problem Addressed: While the patent itself does not articulate a problem, the complaint frames the context as consumers seeking products to efficiently remove lint and fibers to keep fabrics "clean, neat, and well-maintained" Compl. ¶9 From a design perspective, the implicit problem is creating a unique and aesthetically appealing appearance for a common household item to distinguish it in the marketplace.
- The Patented Solution: The D'130 Patent protects the specific ornamental design of a lint remover. The design consists of the visual combination of several features: a compact, generally cubic body with rounded corners and edges; a prominent, flexible-appearing loop handle integrated into the top surface; and a two-part construction featuring a translucent or transparent lower section and an opaque upper cap section D'130 Patent, FIG. 1 D'130 Patent, FIG. 7 The claim is for the overall visual appearance as depicted in the patent's eight figures D'130 Patent, claim
- Technical Importance: The complaint alleges that this "distinctive appearance" has gained "popularity and recognition among consumers" and is the result of an "innovative approach to design" that established the Plaintiff as a market leader Compl. ¶10
Key Claims at a Glance
- Design patents contain a single claim. The D'130 Patent's claim is for "The ornamental design for a lint remover, as shown and described" D'130 Patent, claim
- The protected design is defined by the visual characteristics illustrated in the patent's figures, including:
- The overall cubic shape with rounded corners.
- The integrated loop-style handle on the top surface.
- The proportional relationship between the upper opaque cap and the lower translucent body.
- The specific contours and surface features shown from all perspectives D'130 Patent, FIGS. 1-8
III. The Accused Instrumentality
Product Identification
The accused instrumentalities are "lint remover" products offered for sale and sold by the Defendants through numerous e-commerce storefronts, including those on Amazon and Walmart Compl. ¶14 Compl. Schedule A
Functionality and Market Context
- The complaint describes the accused products as functionally identical to the Plaintiff's product, used for removing unwanted fibers from clothing and other fabrics Compl. ¶9 However, the core of the allegation is not functional, but aesthetic.
- The complaint alleges the accused products are "identical to one another in overall shape, configuration, proportions, and ornamental features" Compl. ¶17 It further alleges that the Defendants' online stores use "identical or substantially similar product images, listing text, and keywords," supporting an inference of a common sourcing and coordinated sales effort to trade on the patented design's popularity Compl. ¶18
IV. Analysis of Infringement Allegations
The standard for design patent infringement is the "ordinary observer" test, which asks whether an ordinary observer, giving such attention as a purchaser usually gives, would be deceived into purchasing the accused product believing it to be the patented design. The complaint presents its infringement theory through a side-by-side visual comparison. The table on page 9 of the complaint juxtaposes figures from the D'130 Patent with photographs of an allegedly infringing product Compl. p. 9
This analysis will not use a traditional claim chart, as the claim is the design as a whole. Instead, the analysis focuses on the comparison of key ornamental features as presented in the complaint.
| Key Ornamental Feature (from D'130 Patent) | Alleged Infringing Feature (from Complaint's Photos) | Complaint Citation | Patent Citation |
|---|---|---|---|
| The overall ornamental design for a lint remover as shown and described. | The accused products are alleged to be "substantially the same as the design claimed in the D'130 Patent, such that an ordinary observer...would find the accused design substantially the same as the claimed design." | ¶17 | claim |
| A generally cubic body with rounded corners and edges. | Photographs show the accused product has a nearly identical cubic body with similarly rounded corners and proportions. | p. 9 | FIG. 1 |
| A looped handle integrated into the top surface of the device. | Photographs show a looped handle that is visually indistinguishable in shape, size, and placement from the one depicted in the patent. | p. 9 | FIG. 1; FIG. 7 |
| A two-part visual construction, with an opaque upper cap and a translucent lower body. | Photographs show the accused product emulates this two-part construction, with a colored, opaque cap and a clear lower section. | p. 9 | FIG. 1 |
- Identified Points of Contention:
- Scope Questions: The central question will be whether the overall visual impression of the accused products is "substantially the same" as that of the D'130 Patent's design in the eyes of an ordinary observer. Any defense would likely need to identify visual differences significant enough to alter that overall impression.
- Technical Questions: A potential issue, not raised in the complaint, is the role of prior art. The infringement analysis is performed from the perspective of an ordinary observer deemed to be familiar with the prior art. If Defendants could demonstrate that key features of the design (e.g., a cubic shape, a loop handle) were common in prior art lint removers, the focus of the infringement test might narrow to the unique combination of those features and more subtle design elements.
V. Key Claim Terms for Construction
In a design patent case, claim construction does not involve defining textual terms as in a utility patent case. Instead, the "claim" is the visual design as a whole, as depicted in the patent drawings. The analysis focuses on the overall ornamental appearance rather than the definition of any specific word. Practitioners may therefore focus on identifying the novel and non-functional ornamental features that create the design's overall visual impression.
- The "Term": The overall visual appearance of the Lint Remover.
- Context and Importance: The scope of the patent's protection is defined by the drawings. The infringement analysis will depend entirely on a visual comparison between the design shown in these drawings and the appearance of the accused products. The key is the gestalt impression created by the combination of all visual elements.
- Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: A party might argue that the design's scope covers any lint remover with the general combination of a cubic body, a top loop handle, and a two-part transparent/opaque construction, even with minor variations. The solid lines in the figures define the claimed design D'130 Patent, FIGS. 1-8
- Evidence for a Narrower Interpretation: A party could argue that the design is limited to the exact proportions, curvatures, and surface contours as shown in the patent figures. Any deviation in the accused product, even if minor, could be argued to create a different overall visual impression, thus avoiding infringement.
VI. Other Allegations
- Indirect Infringement: The complaint's prayer for relief requests that Defendants be enjoined from "aiding, abetting, contributing to, or otherwise assisting anyone" in infringing the patent Compl., Prayer for Relief ¶1(b) However, the body of the complaint and the sole count for infringement focus exclusively on allegations of direct infringement under 35 U.S.C. § 271(a) Compl. ¶¶22-24 No specific facts are pleaded to support a separate claim for indirect infringement.
- Willful Infringement: The complaint alleges that Defendants' infringement "has been and continues to be willful" Compl. ¶25 This allegation is based on "information and belief" that Defendants "knowingly and willfully infringed" Compl. ¶15 The complaint does not allege pre-suit knowledge via a notice letter but may implicitly base the willfulness claim on the alleged coordinated nature of the infringement and the use of tactics to conceal identities Compl. ¶18 Compl. ¶20
VII. Analyst’s Conclusion: Key Questions for the Case
A question of visual identity: Will an ordinary observer, comparing the accused products to the D'130 Patent's drawings, find the designs to be "substantially the same"? The outcome will likely depend heavily on the side-by-side visual evidence presented by the Plaintiff Compl. p. 9, as the similarities appear striking at the pleading stage.
A question of enforceability: Given that the lawsuit targets a large number of foreign-based, anonymous online sellers, a central challenge will be procedural and logistical. The case may turn on the court's willingness to allow proceedings against unidentified entities and the Plaintiff's ability to effectively enforce any resulting injunction or monetary award against parties alleged to be actively concealing their assets and identities.
A question of remedy: If infringement is found, a key issue will be the measure of monetary relief. The Plaintiff has pleaded entitlement to damages under 35 U.S.C. § 284, but also, and perhaps more significantly, has reserved the right to elect to recover the Defendants' "total profits" from sales of the infringing products, a remedy unique to design patents under 35 U.S.C. § 289 Compl. ¶28