Huang v. Shenzhen Zhaocheng Technology Co Ltd

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: William Huang
  • Defendant: ShuoerTechnology and the Individuals and Entities operating ShuoerTechnology
  • Plaintiff's Counsel: Alioth Law
• Case Identification: 1:25-cv-11411, N.D. Ill., 02/23/2026
• Venue Allegations: Plaintiff alleges venue is proper because Defendants are not U.S. residents and are therefore subject to venue in any judicial district. The complaint further alleges that Defendants target consumers in the United States, including Illinois, through online e-commerce stores.
• Core Dispute: Plaintiff alleges that Defendants' online sales of modular pet tents infringe one utility patent and two design patents owned by Plaintiff.
• Technical Context: The technology at issue relates to modular, combinable play tents for pets, which can be connected in various configurations using tunnels and zipper mechanisms.
• Key Procedural History: The complaint describes a developmental lineage for the patents-in-suit, stating that U.S. Design Patent No. D971,526 was a "prototype," which was followed by a purported continuation-in-part application that resulted in U.S. Design Patent No. D982,583. It further alleges that the '786 utility patent "integrated the ideas" of the two design patents. Notably, the subject matter of the '583 Patent (an "Electronic Device") appears inconsistent with the complaint's description of it as relating to pet tents.

Case Timeline

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

U.S. Patent No. 11,939,786 - "Combinable Tent"

The Invention Explained

• Problem Addressed: The patent's background section states that ordinary tents offer limited space and that existing combinable tents have restrictive connection modes, particularly for the channels between tents, which limits creative assembly '786 Patent, col. 1:10-24
• The Patented Solution: The invention is a modular tent system comprising "tent modules" and "channel modules" designed for versatile interconnection '786 Patent, abstract The core technical feature is a unique zipper assembly at both ends of each channel module, which allows any channel end to be connected to another channel module or to a tent module, thereby enabling the creation of more varied and extensive play structures '786 Patent, col. 1:51-60 This is illustrated in the connection between modules 24 and 25 in Figure 2 '786 Patent, FIG. 2
• Technical Importance: The described modular zipper design purports to provide greater flexibility and creativity in assembling play structures compared to prior art systems with more limited connection options '786 Patent, col. 1:44-51

Key Claims at a Glance

• The complaint asserts independent Claim 1 '786 Patent, col. 6:2-49 Compl. ¶17
• Essential elements of Claim 1 include:
  • A combinable tent with a plurality of tent modules and at least one channel module.
  • Each tent module has a spatial structure with at least one opening.
  • The channel module includes zipper assemblies at both ends.
  • Each zipper assembly comprises a "first zipper rack and a second zipper rack independent of each other."
  • The first zipper rack includes a first slider, a first retaining box at one end, and a first top stopper at the other end.
  • The second zipper rack includes an insert pin at one end and a second top stopper at the other end.
  • The retaining box of the first rack is aligned with the top stopper of the second rack, and the insert pin of the second rack is aligned with the top stopper of the first rack.
  • The openings on the tent modules have a matching zipper rack to connect with the channel module's zipper assembly.
  • The first zipper rack of one module is configured to connect to the second zipper rack of an adjacent module.
• The complaint does not explicitly reserve the right to assert dependent claims.

U.S. Design Patent No. D971,526 - "Outdoor Pet Playpen Tent"

The Invention Explained

• Problem Addressed: Design patents protect the novel, non-obvious, and ornamental appearance of an article of manufacture rather than its utilitarian features.
• The Patented Solution: The patent claims the specific ornamental design for a multi-component pet playpen as depicted in its figures '526 Patent, p.1, "CLAIM" The overall design features a combination of several differently shaped modules-including cubic, hexagonal, A-frame, and conical tower structures-connected by tunnels, which creates a distinct visual impression '526 Patent, FIG. 1

Key Claims at a Glance

• The single claim covers the "ornamental design for an outdoor pet playpen tent, as shown and described" '526 Patent, p.1

U.S. Design Patent No. D982,583 - "Electronic Device"

• Technology Synopsis: The patent protects the ornamental design of a foldable electronic device, such as a smartphone or tablet, as shown in its figures '583 Patent, Title '583 Patent, FIG. 1 The complaint alleges this patent is part of a "set of tents for pets" and is a "continuation-in-part of the '526 Patent" Compl. ¶9 Compl. ¶10 However, the patent document itself identifies the article as an "Electronic Device" and its filing date precedes the filing date of the '526 Patent.
• Asserted Claims: The single claim is for the "ornamental design for an electronic device, as shown and described" '583 Patent, p.1
• Accused Features: The complaint accuses Defendants of selling products that "copied the design of the Asserted Patents," which are collectively described as pet tents Compl. ¶1 Compl. ¶9

III. The Accused Instrumentality

Product Identification

The complaint refers to the accused products generally as "Infringing Products" sold by Defendants on "Online Marketplaces" Compl. ¶1 No specific product names or models are identified.

Functionality and Market Context

• The accused products are described as sets of pet tents that contain "tent modules, channel modules, and zipper assemblies arranged to connect them" Compl. ¶17
• The complaint alleges the products are "substantially identical" to Plaintiff's products and the designs claimed in the asserted design patents, suggesting they are direct competitors in the online marketplace for modular pet playpens Compl. ¶16

IV. Analysis of Infringement Allegations

No probative visual evidence provided in complaint.

'786 Patent Infringement Allegations

Identified Points of Contention

• Scope Questions: A central issue may be whether the term "zipper assemblies," as defined by the specific combination of elements in Claim 1 (e.g., "independent" first and second racks, stoppers, insert pins), can be construed to read on the connection mechanisms of the accused products, about which the complaint provides no structural detail.
• Technical Questions: What evidence does the complaint provide that the accused products' zippers incorporate every claimed component of the assembly? The allegation that they contain "zipper assemblies" Compl. ¶17 is conclusory and does not specify if those assemblies contain the precise configuration of two independent racks, sliders, retaining boxes, insert pins, and stoppers required by the claim.

V. Key Claim Terms for Construction

• The Term: "a first zipper rack and a second zipper rack independent of each other" (from Claim 1).

  • Context and Importance: This limitation defines the core mechanism for interconnectivity. The case may turn on whether the accused products use a conventional zipper or a system that meets this "independent" two-rack structure. Practitioners may focus on this term because it appears to be a primary point of novelty.
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Interpretation: The patent does not explicitly define "independent," which might support an argument that any zipper mechanism with two distinct, connectable tracks meets the limitation, regardless of their physical integration.
    • Evidence for a Narrower Interpretation: The embodiment shown in Figure 3 and described in the specification depicts two separate, parallel zipper racks (201, 202) arranged on the tape of a channel port '786 Patent, col. 4:45-52 '786 Patent, FIG. 3 A defendant could argue this structural arrangement limits the term "independent" to physically distinct and separate tracks, rather than the two interlocking sides of a standard zipper.

• The Term: "zipper assemblies" (from Claim 1).

  • Context and Importance: Claim 1 defines this term by listing a specific set of required components (slider, retaining box, top stoppers, insert pin). Infringement requires the accused product to contain all of these elements in the claimed arrangement.
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Interpretation: A plaintiff might argue that these terms refer to standard zipper components and that functionally equivalent parts in an accused device should satisfy the limitation, even if they are not explicitly named as such in the product's own materials.
    • Evidence for a Narrower Interpretation: The claim uses conjunctive language ("a first slider...; a first retaining box...; and a second top stopper..."). A defendant will likely argue that this creates a checklist and that the absence of any single element (e.g., the "first top stopper") from an accused product's zipper means it does not have the claimed "zipper assembly." The patent specification explicitly calls out each of these components with reference numerals, reinforcing their status as distinct claim elements '786 Patent, col. 4:36-42

VI. Other Allegations

• Indirect Infringement: The complaint alleges both direct and indirect infringement Compl. ¶15 Compl. ¶36 However, it does not plead specific facts to support the elements of inducement or contributory infringement, such as knowledge of the patents combined with specific acts intended to encourage infringement by third parties.
• Willful Infringement: The complaint alleges that Defendants acted "knowingly and intentionally" and with "willful blindness" Compl. ¶27 Compl. ¶32 It does not, however, allege any specific facts indicating that Defendants had pre-suit knowledge of the Asserted Patents.

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

• A threshold issue will be one of subject matter relevance: what is the basis for asserting U.S. Design Patent No. D982,583, which claims an "Electronic Device," against products described exclusively as "tents for pets"? The court will need to resolve the significant factual discrepancy between the complaint's characterization of this patent Compl. ¶9-¶10 and the content of the patent document itself.
• A key evidentiary question for the '786 utility patent will be one of structural correspondence: do the accused products' connection mechanisms incorporate the highly specific, multi-component "zipper assembly" recited in Claim 1, including two functionally "independent" zipper racks and the precise arrangement of sliders, stoppers, retaining boxes, and insert pins?
• For the '526 design patent, the central question will be one of ornamental identity: is the overall visual appearance of the accused products substantially the same as the specific multi-component design depicted in the patent's figures, from the perspective of an ordinary observer familiar with the prior art? Answering this will require visual evidence of the accused products, which has not been provided.