Three complaints, one design patent
On November 9, 2026, SharkNinja Operating LLC and SharkNinja Sales Company filed three 11-page complaints for patent infringement in the District of Massachusetts, Eastern Division, each with a jury demand: SharkNinja Operating LLC v. Shenzhen Shi Youdian Kaopu Sheji Youxian Gongsi, No. 1:26-cv-15018; SharkNinja Operating LLC v. Ningbo Yibo Trade Co., Ltd., No. 1:26-cv-15019; and SharkNinja Operating LLC v. Quanzhou Taishang Touziqu Suixi Maoyi Youxian Gongsi, No. 1:26-cv-15020. Apart from the defendant, the storefront, and the accused brand, the three complaints read the same. Each pleads a single count of direct infringement of U.S. Patent D1,076,580 under 35 U.S.C. 271(a).
The plaintiffs are SharkNinja Operating LLC, which the complaints describe as a Delaware limited liability company with its principal place of business in Needham, Massachusetts, and SharkNinja Sales Company, alleged to be a wholly owned subsidiary of SharkNinja Operating LLC and an implied licensee of the patent.
| Case | No. | Accused brand | Amazon storefront and listing named in the complaint |
|---|---|---|---|
| SharkNinja Operating LLC v. Shenzhen Shi Youdian Kaopu Sheji Youxian Gongsi | 1:26-cv-15018 | Azmsary | AZMSARY-US (Seller ID A2JDDVKF1ZK9R9); ASIN B0H9QD2HN6 |
| SharkNinja Operating LLC v. Ningbo Yibo Trade Co., Ltd. | 1:26-cv-15019 | Doghly | Doghly (Seller ID A1OIBMMEJVCXRA); ASIN B0HLKSKS67 |
| SharkNinja Operating LLC v. Quanzhou Taishang Touziqu Suixi Maoyi Youxian Gongsi | 1:26-cv-15020 | Fiii | Flory.store (Seller ID AFJGKJKE7KTXM); ASIN B0DYK61VW3 |
The design patent
U.S. Patent D1,076,580, titled Drink Maker Dasher, issued May 27, 2025, from Application No. 29/944,388, filed May 28, 2024. The patent names SharkNinja Operating LLC as applicant and assignee. Its single claim covers the ornamental design for a drink maker dasher, as shown and described; the description says the dashed broken lines in the figures illustrate portions of the drink maker dasher that form no part of the claimed design.
Each complaint alleges that SharkNinja Operating LLC owns all right, title, and interest in the patent and that the Ninja SLUSHi line, including the Ninja SLUSHi Professional Frozen Drink Maker (model FS301), the Ninja SLUSHi XL Smart Frozen Drink Maker, and the Ninja SLUSHi Max Smart Frozen Drink Maker, embodies the claimed dasher design. It alleges that the product box directs buyers to sharkninja.com/patents, which lists the patent for the FS3 series, and that this public marking page has given constructive notice of the patent since at least October 25, 2025.
What the complaints allege about the defendants
Each complaint alleges, on information and belief, that its defendant is a limited company organized under the laws of the People's Republic of China, with a business address in Shenzhen, Guangdong Province (No. 1:26-cv-15018), Ningbo, Zhejiang Province (No. 1:26-cv-15019), or Quanzhou, Fujian Province (No. 1:26-cv-15020). Each alleges that public records, including the Amazon storefront listed above, which it says gives the defendant's business name and address, indicate that the defendant operates the Amazon store selling the accused frozen drink makers. Each further alleges, on information and belief, that the defendant sells, offers to sell, distributes, or facilitates the sale of those products to consumers in the United States, including in the District of Massachusetts, through fully interactive e-commerce marketplaces and online storefronts.
Each count alleges that the defendant has made, used, offered to sell, sold, and/or imported the accused frozen drink makers, that they appropriate the patented ornamental design, and that they are substantially the same in overall impression. Each complaint shows an image from the Amazon listing, captured November 6, 2026, and photographs of the accused product's dasher, set beside the Ninja SLUSHi dasher and beside figures from the patent. Each alleges that the defendant has had knowledge of the patent at least since the complaint was filed.
Each prayer seeks a judgment of infringement under 35 U.S.C. 271(a); a preliminary and permanent injunction under 35 U.S.C. 283 against products, including the accused brand's frozen drink makers, that embody, appropriate, or are colorably similar to the ornamental design claimed in the patent; and further relief the court deems just and proper.
What to watch next
Watch for service on the defendants, answers or defaults, and any motion for a preliminary injunction under 35 U.S.C. 283. Any of these cases can end at any time, including by settlement or voluntary dismissal.