Huang v. =

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Shaoming Huang (individual)
  • Defendant: The Defendant Identified on Schedule A
  • Plaintiff's Counsel: Alioth Law
• Case Identification: 1:26-cv-02454, N.D. Ill., 03/23/2026
• Venue Allegations: Plaintiff alleges venue is proper because Defendants do not reside in the United States and are subject to venue in any district, and further that Defendants solicit and transact business in the Northern District of Illinois through interactive e-commerce stores.
• Core Dispute: Plaintiff alleges that Defendants' sale of modular pet tents on online marketplaces infringes one utility patent and two design patents owned by Plaintiff.
• Technical Context: The technology at issue relates to modular tent structures, such as pet playpens, that can be interconnected using channels and specialized zipper assemblies to create customizable enclosures.
• Key Procedural History: The complaint notes that U.S. Patent No. D982,583 S is a continuation-in-part of U.S. Patent No. D971,526 S. However, the provided '583 patent does not appear to be related to the '526 patent. The complaint also references a separate, unasserted "'853 Patent" as the continuation-in-part, creating an ambiguity in the pleading.

Case Timeline

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

U.S. Patent No. 11,939,786 B1 - "Combinable Tent"

The Invention Explained

• Problem Addressed: The patent addresses the limitations of ordinary tents for children or pets, which have limited space, simple internal structures, and restricted combination modes, particularly for the channels connecting them '786 Patent, col. 1:10-24
• The Patented Solution: The invention is a modular tent system comprising multiple "tent modules" and interconnecting "channel modules" '786 Patent, col. 1:32-34 The key innovation appears to be the use of specific zipper assemblies at the ends of the channel modules, which allow the channels to be connected to either the tent modules or to other channel modules, enabling the creation of extended corridors and more varied spatial structures '786 Patent, col. 2:50-60 '786 Patent, FIG. 2
• Technical Importance: This modular design allows users to "creatively build and obtain different spatial structures" tailored to their preferences and space requirements '786 Patent, col. 2:45-48

Key Claims at a Glance

• The complaint asserts at least independent claim 1 Compl. ¶17
• Essential elements of independent claim 1 include:
  • A plurality of tent modules with at least one opening.
  • At least one channel module connected to the tent modules.
  • The channel module comprising a channel and "zipper assemblies" at both ends.
  • Each zipper assembly comprising a first and second zipper rack, independent of each other, arranged along a circumferential direction of a port.
  • A specific arrangement of a first slider, a first retaining box, and a first top stopper on the first zipper rack.
  • A specific arrangement of an insert pin and a second top stopper on the second zipper rack.
  • The opening of each tent module being provided with a matching first or second zipper rack.
• The complaint does not explicitly reserve the right to assert dependent claims.

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

The Invention Explained

• Problem Addressed: Design patents protect the ornamental appearance of an article of manufacture rather than its utilitarian features. This patent protects a specific aesthetic design for a modular pet playpen.
• The Patented Solution: The patent claims the ornamental design for a multi-component pet playpen as shown in its figures '526 Patent, claim The design features several distinct modules-including cubic, hexagonal, and tower-like structures-connected by flexible tunnels '526 Patent, FIG. 1 The overall visual impression is one of a complex, interconnected play structure.
• Technical Importance: The design provides a particular aesthetic for a modular pet enclosure, distinguishing it visually from other products in the market.

Key Claims at a Glance

• Design patents have a single claim: "The ornamental design for an outdoor pet playpen tent, as shown and described" '526 Patent, claim Infringement is assessed by comparing the patented design to the accused product from the perspective of an "ordinary observer."

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

• Technology Synopsis: The patent claims the ornamental design for an electronic device, which appears to be a large, foldable tablet or similar display device with a visible hinge mechanism. The design is characterized by its thin profile and minimalist aesthetic '583 Patent, FIG. 1 '583 Patent, FIG. 3
• Asserted Claims: As a design patent, it contains a single claim for the ornamental design shown '583 Patent, claim
• Accused Features: The complaint alleges that all asserted patents, including the '583 Patent, "compromise a set of tents for pets" Compl. ¶9 However, the subject matter of the '583 Patent is an "Electronic Device" and bears no resemblance to a pet tent, raising a question about the basis for its inclusion in this lawsuit.

III. The Accused Instrumentality

Product Identification

• The complaint identifies the accused products as "Infringing Products" sold by Defendants on "Online Marketplaces" Compl. ¶1

Functionality and Market Context

• The complaint alleges the accused products are modular pet tents that are "substantially identical" to Plaintiff's products and patented designs Compl. ¶16
• Functionally, the products are alleged to possess "tent modules, channel modules, and zipper assemblies arranged to connect them" Compl. ¶17
• The complaint alleges these products are sold in direct competition with Plaintiff's own product, causing price erosion and harm Compl. ¶1 Compl. ¶23
• No probative visual evidence provided in complaint.

IV. Analysis of Infringement Allegations

The complaint's infringement allegations are presented in a conclusory manner without a detailed claim chart. For the '786 Patent, the core allegation is that the accused products contain the same general components as the invention Compl. ¶17 For the '526 Patent, the allegation is that the products are "substantially identical" to the patented design Compl. ¶16

'786 Patent Infringement Allegations

Identified Points of Contention

• Technical Questions: A primary question will be whether the "zipper assemblies" of the accused products meet the highly specific structural limitations recited in claim 1 of the '786 Patent. The claim requires not just zippers, but a specific configuration of independent racks, sliders, retaining boxes, and insert pins. The complaint provides no detail on this point, suggesting discovery will focus on the precise construction of the accused connectors.
• Scope Questions: For the '526 Patent, the central issue will be whether an ordinary observer, giving such attention as a purchaser usually gives, would find the accused products "substantially the same" as the patented design. This analysis will depend entirely on visual evidence of the accused products, which is absent from the complaint.
• Factual Questions: The complaint's assertion of the '583 Patent, which claims a design for an "Electronic Device," against products described as "tents for pets" Compl. ¶9 presents a fundamental factual inconsistency that may be subject to early challenge.

V. Key Claim Terms for Construction

The complaint does not provide sufficient detail for a definitive analysis of claim construction disputes. However, based on the technology, certain terms may become central.

• The Term: "zipper assemblies" (as defined in claim 1 of the '786 Patent)
• Context and Importance: This term is the most detailed and structurally specific limitation in independent claim 1. Infringement will likely hinge on whether the accused products contain a connector that meets all elements of this definition, including the "first zipper rack and a second zipper rack independent of each other" and the specific arrangement of sliders, stoppers, retaining boxes, and insert pins. Practitioners may focus on this term because a finding that the accused products use a conventional, single-part zipper could be dispositive of non-infringement.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The patent states that the invention's "greatest advantage" is implementing "compatible interconnection and intercommunication" using zipper assemblies, which could be argued to support a construction that covers any zipper structure achieving this goal '786 Patent, col. 2:50-56
  • Evidence for a Narrower Interpretation: The claim language itself is highly specific, defining the "zipper assembly" as comprising two independent racks and a particular combination of hardware '786 Patent, col. 6:17-30 Figure 3 provides a detailed diagram of this specific two-rack zipper structure, which could be used to argue that the term is limited to the precise embodiment shown '786 Patent, FIG. 3

VI. Other Allegations

• Indirect Infringement: The complaint makes a general allegation of indirect infringement Compl. ¶15 Compl. ¶36 but provides no specific facts to support the required elements of knowledge and intent, such as allegations related to product instructions or advertisements that encourage infringement.
• Willful Infringement: The complaint alleges that Defendants' conduct has been "willful, intentional, purposeful, and in disregard of and indifferent to the rights of Plaintiff" Compl. ¶32 It further alleges that Defendants are acting "knowingly and intentionally or at least with reckless disregard or willful blindness" Compl. ¶27 The complaint does not specify whether this allegation is based on pre- or post-suit knowledge.

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

This case, in its initial pleading stage, presents several fundamental questions that will likely define its trajectory.

• A core issue will be one of factual basis: can Plaintiff substantiate the allegation that U.S. Patent No. D982,583 S, which claims the design for an "Electronic Device," is infringed by the sale of "tents for pets"? This apparent discrepancy may be a threshold issue.
• A key evidentiary question will be one of technical specificity: can Plaintiff produce evidence showing that the accused products' connectors meet the detailed, multi-part definition of the "zipper assemblies" required by claim 1 of the '786 Patent, or will discovery reveal a more conventional and non-infringing fastener?
• Finally, the design patent claims will raise a question of visual identity: once evidence is presented, will an ordinary observer perceive the overall ornamental design of the accused products to be substantially the same as the specific combination of shapes and structures claimed in the '526 Patent?