SharkNinja Operating LLC v. Shenzhen Jinchannel Innovation Technology Co Ltd

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: SharkNinja Operating LLC and SharkNinja Sales Company (Delaware)
  • Defendant: Shenzhen JinChannel Innovation Technology Co., Ltd., Zhongshan Aouball Electric Appliances Co., Ltd., and Shenzhen Gifanghe Electric Dianzishangwu Youxiangongsi (China)
  • Plaintiff's Counsel: Shook, Hardy & Bacon L.L.P.
• Case Identification: 1:25-cv-13624, D. Mass., 03/16/2026
• Venue Allegations: Plaintiff alleges venue is proper because Defendants have committed acts of infringement in and transact business in the district. As foreign entities, Plaintiff also alleges they may be sued in any judicial district.
• Core Dispute: Plaintiff alleges that Defendants' portable air fryer products infringe a design patent and a utility patent related to the design and functionality of Plaintiff's Ninja CRISPi product line.
• Technical Context: The dispute centers on the design and functional configuration of compact, countertop air fryers, a significant and competitive category in the home appliance market.
• Key Procedural History: The complaint alleges that Plaintiff provided constructive notice of the patents-in-suit through a public patent-marking webpage. This allegation may be used to support claims for damages and willful infringement.

Case Timeline

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

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

• Patent Identification: U.S. Design Patent No. D1,101,481, titled "Air Fryer Adapter," issued November 11, 2025 (the "'481 Patent").

The Invention Explained

• Problem Addressed: The patent addresses the need for a new, original, and ornamental design for an air fryer adapter, which is a component that facilitates the use of a cooking device with different-sized containers.
• The Patented Solution: The patent claims the specific visual and aesthetic characteristics of an air fryer adapter as depicted in its figures Compl. ¶20 The design features a generally square shape with rounded corners, a raised central portion, and specific surface contours. The complaint alleges this design "captures the essence of the product" and its functionality Compl. ¶22
• Technical Importance: An ornamental design can provide a product with a distinct visual identity in a crowded market, serving as a source identifier for consumers Compl. ¶19

Key Claims at a Glance

• The patent contains a single claim for "The ornamental design for an air fryer adapter, as shown and described."

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 September 30, 2025 (the "'739 Patent").

The Invention Explained

• Problem Addressed: The patent background describes conventional countertop cooking systems like air fryers, which typically use a drawer-style basket Compl. ¶14 '739 Patent, col. 1:31-44 The complaint frames the problem as a lack of versatility in these traditional designs Compl. ¶14
• The Patented Solution: The patent describes a cooking system composed of a removable cooking device (containing a heating element and fan) that can be positioned over a separate vessel to create a cooking chamber '739 Patent, abstract This modular approach allows a user to prepare, cook, serve, and store food in the same vessel, which is supported by a separate base that elevates the vessel from the countertop '739 Patent, FIG. 1A Compl. ¶14
• Technical Importance: This configuration allows for a more flexible and integrated cooking process compared to traditional drawer-based air fryers, and enables compatibility with vessels of different sizes Compl. ¶14 Compl. ¶22

Key Claims at a Glance

• The complaint asserts independent claim 1 and notes infringement of claims 7 and 14 as well Compl. ¶51 Compl. ¶58
• Claim 1 requires:
  • A unitary vessel with a top opening, a closed bottom, and an internal cavity, configured to support a cooking device at its top opening to receive heated airflow.
  • A U-shaped base fixed to opposed sidewalls of the vessel.
  • The base is configured to rest on a support surface.
  • The base is also configured to support the vessel's closed bottom without making contact with the cooking device positioned on top of the vessel.

III. The Accused Instrumentality

Product Identification

• The accused products are Arecovas-branded air fryers, specifically identified as the "Arecovas 4-in-1 Portable Glass Air Fryer" (the "Accused Products") Compl. ¶36 Compl. ¶37 The complaint identifies Defendant JinChannel as the owner of the "Arecovas" brand, Defendant Aouball as the manufacturer, and Defendant Gifanghe as the seller via online storefronts like Amazon.com Compl. ¶¶26-32

Functionality and Market Context

• The Accused Products are described as portable glass air fryers that, like Plaintiff's Ninja CRISPi, feature a removable top-mounted cooking unit that rests on a separate glass vessel Compl. ¶53 Compl. ¶54 This vessel is held within a plastic base Compl. ¶55 The complaint alleges the Accused Products are "obvious knock-off[s]" that were "intentionally designed to copy the form and function" of the Ninja CRISPi and bear a "striking resemblance" to it Compl. ¶36 Compl. ¶51 The complaint provides a side-by-side photographic comparison of the Accused Product and the Ninja CRISPi to illustrate their alleged similarity Compl. ¶37

IV. Analysis of Infringement Allegations

'481 Patent Infringement Allegations

The complaint does not contain a claim chart for the asserted design patent. Instead, it advances its infringement theory through prose and visual comparisons, consistent with the legal standard for design patent infringement, which focuses on the overall visual impression created by the design. The complaint alleges that the Accused Products, specifically their size adapter, "embody and appropriate the overall visual appearance and ornamental features" of the design claimed in the '481 Patent and are "substantially the same in overall impression to the patented design" Compl. ¶43 To support this, the complaint provides side-by-side images comparing figures from the '481 Patent with photographs of the accused Arecovas adapter from multiple perspectives Compl. ¶44

'739 Patent Infringement Allegations

• Identified Points of Contention:
  • Scope Questions: A potential issue for the court may be the construction of the term "U-shaped base." The analysis could focus on whether the term requires a specific geometry or encompasses a broader category of bases that are U-shaped in at least one cross-section, and whether the Accused Product's base meets that definition.
  • Technical Questions: The complaint's allegations rely on visual inspection from product marketing materials. A factual question may arise as to whether the base of the Accused Product is "fixed to opposed sidewalls" in a manner consistent with the patent's teachings, or if the connection is functionally different. Similarly, evidence beyond marketing photos may be required to confirm that the cooking device does not contact the base during all modes of normal operation.

V. Key Claim Terms for Construction

• The Term: "unitary vessel" (from Claim 1 of the '739 Patent)

• Context and Importance: This term defines the primary cooking container. Its construction will be critical to determining if the accused glass bowl with an attached plastic base constitutes a "unitary" structure or a multi-component assembly that might fall outside the scope of the claim.

  • Intrinsic Evidence for a Broader Interpretation: The term "unitary" is not explicitly defined, which may support an interpretation that it means the vessel functions as a single, integrated piece, even if composed of different materials fused together.
  • Intrinsic Evidence for a Narrower Interpretation: The figures, such as FIG. 4A, depict a vessel (230) that appears to be formed from a single piece of material. A defendant may argue that "unitary" should be construed as "formed of a single, continuous piece of material," potentially excluding a glass vessel permanently attached to a plastic frame.

• The Term: "U-shaped base" (from Claim 1 of the '739 Patent)

• Context and Importance: This term describes the foundational support structure. The dispute may turn on whether the accused product's base, which includes side supports and a bottom platform, falls within the scope of "U-shaped."

  • Intrinsic Evidence for a Broader Interpretation: The term is not narrowly defined in Claim 1. Claim 23 further specifies that the base is "U-shaped at a vertical cross-section" '739 Patent, col. 42:37-39, which could suggest that the term "U-shaped base" in Claim 1 is a broader genus not limited to a specific orientation.
  • Intrinsic Evidence for a Narrower Interpretation: The embodiments shown in figures such as FIG. 31 and FIG. 34 depict a specific structure with flaring handles and support arms. A party could argue that the term should be interpreted in light of these specific examples, limiting its scope to bases with a similar overall structure.

VI. Other Allegations

• Indirect Infringement: The complaint includes a general allegation of direct and indirect infringement Compl. ¶3 However, it does not plead specific facts required to support a claim for either induced or contributory infringement, such as allegations related to user manuals, marketing materials instructing infringing use, or the absence of substantial non-infringing uses.
• Willful Infringement: The complaint alleges that Defendants have had knowledge of the asserted patents, at a minimum, since the filing date of the complaint Compl. ¶45 Compl. ¶59 It further alleges constructive notice of the patents through Plaintiff's public patent-marking webpage since November 12, 2025 Compl. ¶45 Compl. ¶59 These allegations form a basis for potential post-suit willfulness and may be used to argue for pre-suit willfulness based on constructive notice.

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

• A core issue for the design patent claim will be one of visual similarity: will the overall ornamental appearance of the accused Arecovas adapter be deemed substantially the same as the design claimed in the '481 Patent in the eyes of an ordinary observer, particularly in light of the side-by-side photographic evidence presented in the complaint?
• For the utility patent, a central dispute will likely be one of claim construction: can the term "U-shaped base," as used in Claim 1 of the '739 Patent, be construed to cover the accused product's support structure, or will its meaning be narrowed by the specific embodiments depicted in the patent's specification?
• A key evidentiary question will be one of structural and functional correspondence: beyond visual resemblance from marketing images, what evidence will demonstrate that the accused product's components (the vessel and base) are configured and operate in a manner that satisfies each specific limitation of the asserted claims, including the requirements that the vessel be "unitary" and that the base supports the vessel "without contacting the cooking device"?