DCT

1:26-cv-12126

SharkNinja Operating LLC v. Peng Sheng Jialian Co Ltd

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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 1:26-cv-12126, D. Mass., 05/11/2026
  • Venue Allegations: Plaintiff alleges venue is proper because Defendant committed acts of infringement in the district and transacts business there through fully interactive e-commerce storefronts accessible to consumers in Massachusetts.
  • Core Dispute: Plaintiff alleges that Defendant's Tixixc-branded air fryers infringe three of Plaintiff's design patents and one utility patent related to the design and functionality of its Ninja CRISPi portable air fryer.
  • Technical Context: The technology relates to countertop air fryers, specifically a novel configuration featuring a removable heating "pod" that operates on a separate cooking vessel, departing from traditional drawer-style designs.
  • Key Procedural History: The complaint alleges that Plaintiff has provided constructive notice of the patents-in-suit via a public patent-marking website since November 2025. No other significant procedural events are mentioned.

Case Timeline

Date Event
2023-08-01 Earliest Priority Date for '739 Patent
2024-09-04 Application/Priority Date for '567, '472, and '481 Design Patents
2024-09-12 Application Date for '739 Patent
2024-09-26 Plaintiff's Ninja CRISPi Product Launch
2025-09-30 '739 Patent Issued
2025-11-04 '567 Design Patent Issued
2025-11-05 Alleged Constructive Notice for '567 Patent Begins
2025-11-11 '472 and '481 Design Patents Issued
2025-11-12 Alleged Constructive Notice for '472, '481, and '739 Patents Begins
2026-05-11 Complaint Filing Date

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

U.S. Design Patent No. D1,100,567 - "Air Fryer"

  • Patent Identification: U.S. Patent No. D1,100,567, titled "Air Fryer," issued on November 4, 2025.

The Invention Explained

As a design patent, the '567 Patent does not describe a technical problem or solution in text. The patent protects the specific ornamental appearance of a removable air-fryer heating unit, or "pod" Compl. ¶20 The claimed design features a sculpted upper body with an integrated handle depression and a top-mounted control interface, which sits atop a wider, squared-off lower housing with distinct corner legs '567 Patent, FIG. 1 '567 Patent, FIG. 2

Key Claims at a Glance

  • The patent contains a single claim for "The ornamental design for an air fryer, as shown and described" '567 Patent, Claim

U.S. Patent No. 12,426,739 - "Cooking devices and components thereof"

  • Patent Identification: U.S. Patent No. 12,426,739, titled "Cooking devices and components thereof," issued on September 30, 2025.

The Invention Explained

  • Problem Addressed: The patent background describes conventional air fryers that use a drawer-style cooking basket, which can be cumbersome and requires transferring food to a separate dish for serving or storage '739 Patent, col. 1:31-44 '739 Patent, col. 22:1-15
  • The Patented Solution: The patent describes a modular cooking system comprising a removable cooking device and a separate vessel, allowing a user to cook, serve, and store food in the same container '739 Patent, col. 22:1-15 The invention asserted in this complaint, covered by claim 14, is a specific "vessel assembly" comprising a vessel and a U-shaped base that connects to it via a flexible connector plate with a unique interlocking mechanism of indents and detents '739 Patent, col. 42:14-23 '739 Patent, FIG. 30
  • Technical Importance: This assembly provides a secure yet removable connection between the cooking vessel and its handling base, enabling the all-in-one functionality that distinguishes it from prior drawer-based appliances Compl. ¶14

Key Claims at a Glance

  • The complaint asserts infringement of independent claims 1 and 14 Compl. ¶59 Compl. ¶67
  • The essential elements of independent claim 14 are:
    • a vessel having a cavity therein and a sidewall having a first indent and a first detent positioned thereon;
    • a base positioned below a bottom surface of the vessel;
    • a connector plate extending from the base and including a second indent and a second detent;
    • wherein the first detent is received within the second indent, and the second detent is received within the first indent when the base is connected to the vessel;
    • wherein the connector plate is flexible.

U.S. Design Patent No. D1,101,472 - "Air Fryer"

  • Patent Identification: U.S. Patent No. D1,101,472, titled "Air Fryer," issued November 11, 2025.
  • Technology Synopsis: This design patent protects the ornamental appearance of the complete air fryer assembly, showing the removable heating pod in combination with a glass cooking container and a size adapter ring between the two components Compl. ¶21
  • Asserted Claims: The single design claim '472 Patent, Claim
  • Accused Features: The overall appearance of the accused Tixixc product when fully assembled with its glass bowl and adapter Compl. ¶43 Compl. ¶44

U.S. Design Patent No. D1,101,481 - "Air Fryer Adapter"

  • Patent Identification: U.S. Patent No. D1,101,481, titled "Air Fryer Adapter," issued November 11, 2025.
  • Technology Synopsis: This design patent protects the ornamental appearance of a standalone adapter ring designed to interface between an air fryer heating unit and a cooking vessel Compl. ¶22
  • Asserted Claims: The single design claim '481 Patent, Claim
  • Accused Features: The size adapter component included with the accused Tixixc product Compl. ¶51 Compl. ¶52

III. The Accused Instrumentality

Product Identification

The "Tixixc-branded 5-in-1 Glass Air Fryer product with 4QT & 6-Cup Glass Bowls," collectively referred to as the "Accused Products" Compl. ¶29

Functionality and Market Context

The complaint alleges the Accused Products are sold on Amazon.com and are "inferior imitations" and "obvious knock-off[s]" of SharkNinja's Ninja CRISPi product Compl. ¶4 Compl. ¶59 The infringement allegations describe the Accused Products as having a modular system consisting of a heating pod, glass cooking vessels of different sizes, a plastic base, and a size adapter, which allegedly copy the form and function of the patented technology Compl. ¶29 Compl. ¶59 Compl. ¶61 Compl. ¶62 Compl. ¶63 Compl. ¶64 Compl. ¶65 A side-by-side photograph shows the accused Tixixc unit next to the Plaintiff's Ninja CRISPi, highlighting their visual similarity Compl. ¶30

IV. Analysis of Infringement Allegations

D1,100,567 Infringement Allegations

Claim Element (from the Design Claim) Alleged Infringing Functionality Complaint Citation Patent Citation
The ornamental design for an air fryer, as shown and described. The Accused Product's heating pod allegedly bears a substantially similar overall ornamental appearance, including a similar contoured upper body, top-mounted display, and wider lower housing with four corner legs. The complaint includes side-by-side images comparing the patented design figures to photographs of the accused pod. ¶¶35-36 '567 Patent, FIG. 1; '567 Patent, FIG. 2

12,426,739 Infringement Allegations

Claim Element (from Independent Claim 14) Alleged Infringing Functionality Complaint Citation Patent Citation
a vessel having a cavity therein and a sidewall having a first indent and a first detent positioned thereon The accused glass cooking vessel includes a cavity for food and a sidewall with an indent and a detent formed in the glass to facilitate connection with the base. ¶61 col. 38:5-7
a base positioned below a bottom surface of the vessel The Accused Products include a black plastic base part positioned below the bottom surface of the glass vessel. ¶62 col. 38:31-33
a connector plate extending from the base and including a second indent and a second detent The Accused Products allegedly include a connector plate, described as a "vertically oriented black plastic part," which extends from the base and has an indent and detent formed in the plastic. ¶63 col. 38:40-42
wherein the first detent is received within the second indent, and the second detent is received within the first indent when the base is connected to the vessel The complaint alleges the detent on the accused vessel is received within the indent on the accused base, and vice-versa, when the two are connected. ¶64 col. 38:43-52
wherein the connector plate is flexible The complaint alleges the accused "tall black plastic connector plate is made of a thin portion of plastic, which is flexible when pressure is applied to any end," confirmed by inspection. ¶65 col. 38:53-57

Identified Points of Contention

  • Design Patents Scope: A central issue for the three design patents ('567, '472, and '481) will be the application of the "ordinary observer" test. The court will need to determine if an ordinary observer, familiar with the prior art in air fryers, would be deceived into believing the accused Tixixc product is the same as the patented designs. The side-by-side visual comparisons provided in the complaint will be a focal point of this analysis Compl. ¶36 Compl. ¶44 Compl. ¶52
  • '739 Patent Technical Questions: The infringement analysis for the utility patent may turn on factual and technical distinctions. For example, a question exists as to whether the accused product's "vertically oriented black plastic part" Compl. ¶63 functions as the "flexible connector plate" required by claim 14, or if it operates as a more rigid support structure. The precise geometry and interaction of the features alleged to be "indents" and "detents" on the accused product will also be subject to scrutiny.

V. Key Claim Terms for Construction

For U.S. Patent No. 12,426,739

  • The Term: "connector plate"

    • Context and Importance: This term is central to claim 14, defining the key component that links the vessel to its base. The complaint alleges a "vertically oriented black plastic part" on the accused product meets this limitation Compl. ¶63 Practitioners may focus on this term because its construction will determine whether a simple plastic support structure falls within the scope of the more specific, flexible connecting element described in the patent.
    • Intrinsic Evidence for Interpretation:
      • Evidence for a Broader Interpretation: The term is not explicitly defined in the patent, which may support an argument for applying its plain and ordinary meaning, potentially covering a range of connecting structures.
      • Evidence for a Narrower Interpretation: The specification describes the connector plate (2130) as being flexible and part of a system that allows movement to prevent unwanted disengagement from the vessel, creating a "thermal break" from the handlebar (2036) '739 Patent, col. 38:40-57 A party could argue the term should be limited to a structure that performs this specific flexible, thermal-break function as shown in the embodiments (e.g., '739 Patent, FIG. 30; '739 Patent, FIG. 31).

  • The Term: "indent" and "detent"

    • Context and Importance: The claim requires a specific interlocking relationship between indents and detents on the vessel and the connector plate. The infringement allegation rests on features "formed in the glass" and "in the black plastic" of the accused product meeting these definitions Compl. ¶61 Compl. ¶63 The case may turn on whether these general shapes constitute the claimed structures.
    • Intrinsic Evidence for Interpretation:
      • Evidence for a Broader Interpretation: These are common mechanical terms, and a party could argue they should be given their broad, ordinary meanings of a recess and a corresponding projection.
      • Evidence for a Narrower Interpretation: The specification provides specific examples and drawings of the claimed indent (2102) and detent (2104) '739 Patent, FIG. 29 '739 Patent, FIG. 30 A party may argue that the terms are limited by these embodiments, which show a particular geometry designed for a specific interlocking connection '739 Patent, col. 38:5-7

VI. Other Allegations

  • Indirect Infringement: The complaint includes a general allegation of indirect infringement in its introductory paragraphs Compl. ¶3 However, the four formal claims for relief (the counts) are explicitly for direct infringement under 35 U.S.C. § 271(a) Compl. ¶34 Compl. ¶42 Compl. ¶50 Compl. ¶58
  • Willful Infringement: The complaint alleges Defendant had knowledge of the patents-in-suit, at a minimum, as of the filing date of the complaint Compl. ¶68 It further alleges that SharkNinja provided constructive notice of the patents via its public patent-marking website since November 2025 Compl. ¶37 Compl. ¶45 Compl. ¶53 Compl. ¶68 These allegations of both pre-suit constructive notice and post-suit actual notice may form the basis for a claim of willful infringement.

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

This case presents two primary lines of inquiry for the court, one centered on visual design and the other on mechanical function.

  • A core question for the three asserted design patents will be one of visual impression: Will an ordinary observer, acquainted with the prior art, find the overall ornamental appearance of the accused Tixixc air fryer pod, adapter, and full assembly to be substantially the same as the designs claimed in the '567, '481, and '472 patents?
  • A key question for the '739 utility patent will be one of claim scope and structural equivalence: Do the components of the accused product's base-and-vessel connection mechanism meet the specific limitations of claim 14, particularly whether its plastic support constitutes a "flexible connector plate" and whether its molded features are the interlocking "indents" and "detents" as defined by the patent's specification and figures?
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