Shenzhen Jing Cheng Seeks a Declaration That Its Magnetic Air Deflectors Do Not Infringe Spectrum Products' U.S. Patent 12,000,616.

The complaint

The case is Shenzhen Jing Cheng DianZi Keji YanFa Company Limited v. Spectrum Products, LLC d/b/a Eureka Air, No. 2:26-cv-06417 (D. Ariz.), filed September 10, 2026 with a jury demand. The plaintiff is a Shenzhen, China company that the complaint says does business as Kohuipu. The complaint alleges, on information and belief, that Spectrum Products is an Arizona limited liability company based in Mesa and owns the '616 patent.

Two rounds of Amazon complaints

According to the complaint, Amazon removed the plaintiff's magnetic air deflector listings, sold in two-, three-, and four-packs, on December 11, 2025 after an intellectual property complaint asserting the '616 patent. The plaintiff filed an earlier declaratory judgment suit on January 22, 2026, No. 2:26-cv-00445 (D. Ariz.), and voluntarily dismissed it without prejudice on April 21, 2026, after Amazon reinstated the listings when the complaint was withdrawn in February. The plaintiff says it redesigned the product in spring 2026 by adding a metal bracket over the magnet, and that a second complaint on the same patent removed the listings again on May 7, 2026. It says Amazon still holds about 1,500 original and 200 redesigned units.

What the patent covers

U.S. Patent 12,000,616, titled Air deflector system, issued June 4, 2024 and names Spectrum Products LLC as applicant and assignee. Claim 1 covers an air deflector with first and second sidewalls, a magnet retainer extending from the first sidewall with two retainer walls that each have a ledge that directly couples to the magnet, and a magnet held between those walls that has a largest planar surface and, opposite it, an exposed surface that forms a magnetic bond with and faces an external surface. The complaint says the patent claims priority to U.S. Patent 11,703,250, with a priority date of March 9, 2021.

Noninfringement and invalidity theories

The plaintiff reads each independent claim, 1, 10, and 15, to require a magnet with a single largest planar surface opposite the exposed surface, pointing to the examiner's reasons for allowance. It alleges that its magnets are rectangular prisms whose top and bottom faces are the same size, so neither face is the largest, and that in the redesigned product the bracket covers the magnet, so no magnet surface is exposed or contacts the vent grille. On invalidity, it alleges that if the claims are read broadly enough to cover its products, they are obvious over two air deflectors sold on Amazon since 2012 and 2018, combined with a magnet attached by its largest surface, and anticipated by Chinese Patent CN201463188U, published May 12, 2010.

The plaintiff alleges, on information and belief, that Spectrum Products bought one of its original products on or about November 19, 2025 to analyze it, and that Spectrum Products knew or should have known the products do not infringe, which it says makes the case exceptional. It asks for declarations of noninfringement, obviousness, and anticipation, a permanent injunction barring assertion of the '616 patent against its products, and attorneys' fees under 35 U.S.C. 285.

What to watch next

On October 20, 2026, after an election to have the case assigned to a district judge, the docket shows the assigned judges changed, and an order setting deadlines followed on October 21 (ECF No. 10). Watch for service and Spectrum Products' answer, Rule 12 motion, or infringement counterclaim.