Patent 11871811

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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PTAB activity (1)

AIA trial proceedings — IPR, PGR, CBM — filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced directly from the PTAB Trial API.

1 active
  • IPR2026-00343IPRfiled Apr 24, 2026vs. Skechers U.S.A., Inc.Pending

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Cases on file (1)

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Specific litigation cases in our database that name US patent 11871811. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

✓ Generated

As of April 30, 2026, U.S. Patent No. 11,871,811 is involved in at least one litigation case and one administrative challenge.

District Court Litigation

A patent infringement lawsuit was filed by HandsFree Labs Licensing, LLC, Fast IP, LLC, and Kizik Design, LLC against Skechers U.S.A., Inc. This case includes U.S. Patent No. 11,871,811 as one of six patents-in-suit.

  • Plaintiffs: HandsFree Labs Licensing, LLC; Fast IP, LLC; Kizik Design, LLC
  • Defendant: Skechers U.S.A., Inc.
  • Jurisdiction: U.S. District Court for the Eastern District of Texas.
  • Case Number: 2:25-cv-00744
  • Filing Date: July 24, 2025
  • Status: The case is currently pending. The plaintiffs allege that Skechers' "Hands Free Slip-ins" line of shoes infringes on their patents related to hands-free footwear technology. The complaint asserts that Skechers knowingly and willfully infringed on four utility patents and two design patents.

International Litigation

Fast IP LLC has also been involved in litigation in Europe against various Skechers entities concerning a related European patent, EP4003084, which shares the same title, "Rapid-entry foot wear having a stabilizer and an elastic element." This case was filed on August 13, 2025, in the Unified Patent Court, Local Division Munich.

Administrative Proceedings

In addition to the court case, a petition for inter partes review (IPR) has been filed with the Patent Trial and Appeal Board (PTAB) by Skechers USA Inc. against Fast IP LLC, challenging the validity of U.S. Patent No. 11,871,811.

  • Case Number: IPR2026-00343
  • Filing Date: April 24, 2026
  • Status: Pending. Skechers is challenging 12 claims of the patent, arguing they are anticipated and obvious in light of prior art.

Generated 4/30/2026, 3:27:12 PM