DCT

1:26-cv-10534

Shenzhen Chuangxin Feiyang Technology Co Ltd v. Guo

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Complaint
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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 1:26-cv-10534, N.D. Ill., 08/31/2026
  • Venue Allegations: Venue is asserted on the basis that the Defendants are not residents of the United States and therefore may be sued in any judicial district. The complaint also alleges Illinois-directed commercial contacts.
  • Core Dispute: Plaintiff seeks a declaratory judgment that Defendants' design patent for a mixer pouring shield is invalid, following Defendants' accusation that Plaintiff's own pouring shield product infringes the patent.
  • Technical Context: The dispute concerns the ornamental design of kitchen accessories, specifically pouring shields used with stand mixers to guide ingredients into the bowl and prevent splashing.
  • Key Procedural History: The complaint's primary focus is the patent's prosecution history. The USPTO initially rejected the design claim as anticipated by the Plaintiff's own product (the "Taladad" design). The applicant allegedly overcame this rejection by asserting a grace-period exception based on an earlier public disclosure of the design. The complaint alleges this asserted earlier disclosure was for a different product, and that the applicant's representations to the USPTO were factually incorrect, thus rendering the patent invalid over the original prior art reference.

Case Timeline

Date Event
2024-04-26 Alleged offer for sale of "Pouring shield covers" by Oudizz Store, which applicant later relied on to claim a grace period (Compl. ¶5; Compl. ¶35)
2024-05-11 Plaintiff's "Taladad" product (the accused product and alleged prior art) "Date First Available" on Amazon (Compl. ¶3; Compl. ¶27)
2024-08-03 Plaintiff's records show completed paid orders for its "Taladad" pouring shield (Compl. ¶27)
2025-03-17 Date of Defendant Guo's declaration to the USPTO regarding the Oudizz Store disclosure (Compl. ¶6)
2025-03-24 Application for the '623 Patent filed ('623 Patent, (22))
2025-07-16 USPTO issues Office Action rejecting the sole claim based on Plaintiff's "Taladad" design (Compl. ¶4; Compl. ¶30)
2025-08-18 Applicant responds to rejection, relying on the alleged Oudizz disclosure to disqualify the Taladad reference (Compl. ¶5; Compl. ¶34)
2025-10-28 U.S. Design Patent No. D1,099,623 issues (Compl. ¶7; '623 Patent, (45))
2026-07-20 Plaintiff receives an Amazon-routed message from Defendants accusing its product of infringement (Compl. ¶11; Compl. ¶50)
2026-08-31 Complaint for Declaratory Judgment of Invalidity filed (Compl. p. 1)

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

U.S. Design Patent No. D1,099,623 - "Pouring Shield for Mixer"

  • Patent Identification: U.S. Design Patent No. D1,099,623, titled "Pouring Shield for Mixer", issued on October 28, 2025 (the "'623 Patent").

The Invention Explained

  • Problem Addressed: Design patents protect ornamental appearance, not functional solutions. The functional context of the article is to provide a shield for a stand mixer to prevent ingredients from splashing and to guide them into the mixing bowl.
  • The Patented Solution: The patent claims the specific ornamental design for a pouring shield as depicted in its figures ('623 Patent, claim; '623 Patent, Figs. 1-10). The design features a generally circular body that sits atop a mixer bowl, with a prominent, upward-curving chute for pouring ingredients. The figures also depict what appears to be a two-part or hinged construction, allowing the shield to be opened ('623 Patent, Fig. 10).

Key Claims at a Glance

  • Design patents contain a single claim. The sole claim of the '623 Patent is for "The ornamental design for a pouring shield for mixer as shown and described" ('623 Patent, claim).
  • The claim covers the visual appearance of the article illustrated in Figures 1 through 10 of the patent.

III. The Accused Instrumentality

Product Identification

  • The subject of the dispute is the Plaintiff's own product, a pouring shield for KitchenAid mixers sold under the brand name "Taladad" on Amazon, with ASIN B0D3WGRCBJ (Compl. ¶2; Compl. ¶26). In this declaratory judgment action, this product is referred to as both the "Accused Product" (by Defendants) and the invalidating prior art reference (by Plaintiff) (Compl. ¶2; Compl. ¶31).

Functionality and Market Context

  • The product is marketed as a pouring shield for 4.5- to 5-quart KitchenAid tilt-head mixers (Compl. ¶27). According to the complaint, Defendants' infringement accusation stated that the Taladad product shares "almost the exact same overall shape, outline, surface details and visual style" as the patented design (Compl. ¶11; Compl. ¶51). The complaint alleges this product was publicly available and sold prior to the filing date of the '623 Patent (Compl. ¶28).

No probative visual evidence provided in complaint.

IV. Analysis of Infringement Allegations

As this is a complaint for declaratory judgment of invalidity, it does not contain an affirmative infringement claim chart. Instead, it describes the infringement allegations made by the Defendants that created the justiciable controversy.

The complaint alleges that Defendants' infringement assertion was made in an "Amazon-routed message" (Compl. ¶11; Compl. ¶50). The basis for the infringement allegation, as quoted in the complaint, is that the Plaintiff's Taladad product shares "almost the exact same overall shape, outline, surface details and visual style" as the patented product (Compl. ¶51). This language directly tracks the "ordinary observer" test for design patent infringement, which asks whether an ordinary observer, familiar with the prior art, would be deceived into purchasing the accused product believing it to be the patented design. The complaint notes that the enforcement message stated it included side-by-side comparison images, but these images are not included in the complaint itself (Compl. ¶53).

  • Identified Points of Contention:
    • Validity vs. Infringement: The central dispute is not the degree of visual similarity, but the validity of the '623 Patent in the first place. The complaint alleges that the very product accused of infringement (the Taladad product) is actually invalidating prior art (Compl. ¶¶58-59).
    • Prosecution History Estoppel/Admission: A key issue may be the applicant's conduct during prosecution. The applicant did not dispute the USPTO Examiner's finding that the Taladad design was "substantially the same as that of the claimed design" (Compl. ¶31; Compl. ¶34). This raises the question of whether the patentee is now estopped from arguing the designs are different for infringement purposes, which could strengthen the plaintiff's invalidity argument based on anticipation.

V. Key Claim Terms for Construction

In design patent litigation, there are no textual claim terms to construe. The "claim" is the visual design itself. Analysis focuses on the scope of the design as a whole.

  • The "Term": The overall ornamental design for a "Pouring Shield for Mixer."
  • Context and Importance: The scope of the patented design is critical because the prosecution history provides a significant basis for challenging the patent's validity. The central issue is whether the Plaintiff's pre-filing "Taladad" product falls within the scope of the claimed design. Practitioners may focus on the fact that the applicant, when faced with a rejection over the Taladad design, did not argue that the designs were visually distinct, but instead argued that the Taladad design was not prior art under the grace period exceptions (Compl. ¶34).
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Scope: The claim itself is for the design "as shown and described," and the ordinary observer test allows for minor variations between the patented design and an accused product. The patentee (Defendant) would likely argue for a scope broad enough to cover the Taladad product for infringement purposes.
    • Evidence for a Narrower Scope (or an Invalidating Scope): The prosecution history provides strong evidence that may limit the patent's enforceability. The USPTO Examiner found the Taladad design and the claimed design to be "substantially the same" (Compl. ¶31). The applicant's response, which did not contest this finding, may be treated as an admission that the scope of the claimed design is effectively coextensive with the Taladad design. This admission would be used by the Plaintiff to argue that if the Taladad design was public before the critical date, it anticipates and invalidates the patent.

VI. Other Allegations

  • Indirect Infringement: This is a declaratory judgment action and contains no allegations related to indirect infringement.
  • Willful Infringement: The complaint does not allege willfulness. However, the Plaintiff requests that the court declare the action "exceptional under 35 U.S.C. § 285" and award attorneys' fees (Compl., Prayer D). The basis for this request is the allegation that the patent was procured by relying on a factually unsupported grace-period argument before the USPTO (Compl. ¶¶60-61). This suggests the Plaintiff may pursue a theory of inequitable conduct or litigation misconduct.

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

The resolution of this case appears to hinge on a factual investigation into the patent's prosecution history rather than a traditional design comparison. The key questions for the court are:

  1. A question of historical fact: Was the Amazon listing (ASIN B0CW6FDYTM) used by the applicant to overcome the prior art rejection a public disclosure of the patented pouring shield design before Plaintiff's product was disclosed, or did that listing advertise an unrelated "straw-cover" product at the relevant time, as marketplace data allegedly suggests?
  2. A question of patent validity: If the applicant's grace-period argument is found to be factually baseless, is the '623 Patent invalid as anticipated under 35 U.S.C. § 102 by the Plaintiff's "Taladad" product, which the USPTO Examiner had already found to be "substantially the same" as the claimed design?
  3. A question of inequitable conduct: Did the applicant's reliance on the contested Amazon listing and the associated declaration to the USPTO constitute a knowing and material misrepresentation made with an intent to deceive the agency, potentially rendering the '623 Patent unenforceable and the case exceptional?