Linfo IP, LLC v. Air Oasis, LLC et al.

Linfo IP, LLC, identified as a patent assertion entity (PAE) or non-practicing entity (NPE), initiated this patent infringement lawsuit in the Northern District of Texas. Linfo IP, LLC is a Texas-based limited liability company that holds intellectual property rights related to information retrieval and text content discovery technology. The defendants are Air Oasis, LLC, a manufacturer and retailer of commercial and residential air purifiers based in Amarillo, Texas, and TekZoom, Inc., which operates as "Perfume Empire," an e-commerce platform likely involved in selling perfume products. The alleged infringement by both defendants centers on their use of systems, methods, and user interface technologies for discovering and presenting information within text content, presumably on their respective websites or online platforms. For Air Oasis, this likely refers to how information, such as product details or customer reviews, is organized and displayed on its air purifier website. For TekZoom, Inc. (Perfume Empire), the focus would be on similar functionalities related to the presentation of perfume product information online.

The sole patent asserted in this litigation is U.S. Patent No. 9,092,428, titled "System, Methods and User Interface for Discovering and Presenting Information in Text Content". This patent broadly covers a computer-assisted method for extracting, organizing, and presenting information from unstructured text content, often related to data management and information organization in a user interface. The case was filed on December 19, 2024, in the Northern District of Texas, a venue that has seen an increase in patent litigation filings, partly due to shifts following the TC Heartland Supreme Court decision. While the Eastern and Western Districts of Texas are particularly known for being plaintiff-friendly in patent matters, the Northern District also boasts an experienced judiciary and a patent litigation pilot project, making it an attractive forum for patent holders, including NPEs. As of the current date, a specific judge for this case in the Northern District of Texas has not been publicly identified in the available information.

This case is notable primarily due to Linfo IP, LLC's pattern of asserting the same patent, US 9,092,428, against a diverse range of companies across unrelated industries. Previous targets have included entities in consumer gifting, cookware, and footwear. This strategy indicates Linfo IP's focus on ubiquitous web-based information presentation features, suggesting a broad assertion model against any company with an online presence that allows for discovery and presentation of text-based information. This approach highlights the challenges businesses face in the digital economy from broad software-related patents. There is no publicly available information indicating any inter partes review (IPR) proceedings specifically linked to patent 9,092,428 initiated against Linfo IP, LLC for this case.

Linfo IP, LLC initiated a patent infringement lawsuit against Air Oasis, LLC and TekZoom, Inc. on December 19, 2024, in the U.S. District Court for the Northern District of Texas, seeking a jury trial and relief for alleged infringement of U.S. Patent No. 9,092,428. The patent in question relates to systems, methods, and user interface technologies for discovering and presenting information in text content. Linfo IP, LLC is represented by Ramey LLP.

Key legal developments for this litigation are as follows:

• Filing & Initial Pleadings:

  • 2024-12-19: Linfo IP, LLC filed the original complaint against Air Oasis, LLC and TekZoom, Inc. in the Northern District of Texas (Case No. 3:24-cv-03157). The complaint requested a jury trial and sought relief for infringement of U.S. Patent No. 9,092,428.

• Pre-trial Motions of Substance:

  • As of early June 2026, specific details regarding motions to dismiss, transfer, or stay pending IPR for this particular case (3:24-cv-03157) are not yet publicly detailed in the provided search results. Given the December 2024 filing date, the case is still in relatively early stages of litigation, and such motions might be anticipated or in process.

• Claim Construction (Markman) Outcomes:

  • There are no reported Markman outcomes or scheduled hearings for this specific case yet. Markman hearings typically occur later in the pre-trial phase.

• Discovery Milestones:

  • No specific discovery milestones with strategic significance have been publicly reported for this case.

• Trial Events, Verdict, and Post-trial Motions:

  • Given the recent filing date (December 2024), the case has not reached the trial stage, and therefore, no trial events, verdicts, or post-trial motions have occurred.

• Settlement, Dismissal, Judgment, or Appeal:

  • The case is currently active. There is no information indicating a settlement, dismissal, or judgment in this specific case as of the current date.

• Parallel PTAB IPR/PGR Proceedings:

  • U.S. Patent No. 9,092,428 has been involved in other patent infringement lawsuits filed by Linfo IP, LLC. For instance, it was central to a lawsuit filed in the Western District of Texas on October 11, 2024, against Boston Foundry, Inc., Legendairy Milk, LLC, and Waimate B, LLC. The case against Legendairy Milk, LLC, was voluntarily dismissed without prejudice on January 6, 2025, and closed on January 7, 2025.
  • More significantly, U.S. Patent No. 9,092,428 was declared invalid under 35 U.S.C. § 101 for being directed to patent-ineligible subject matter in the case Linfo IP, LLC v. Trustpilot, Inc., 761 F. Supp. 3d 679, 686 (S.D.N.Y. 2025), in January 2025. This ruling had a collateral estoppel effect, leading to the dismissal with prejudice of Linfo's infringement claims against Aero Global, LLC on July 9, 2025, as Linfo was barred from relitigating the patent's validity.
  • There is no information specifically indicating that Air Oasis, LLC or TekZoom, Inc. have filed IPR or PGR petitions against U.S. Patent No. 9,092,428 with the USPTO PTAB in relation to this specific litigation. However, the invalidation of the patent in another district court case due to § 101 ineligibility is a substantial development that could impact the present litigation due to collateral estoppel. While the Federal Circuit has clarified that the PTAB has jurisdiction over IPRs concerning expired patents, the primary issue for this patent now appears to be its validity under § 101 as determined by a district court.

Linfo IP, LLC is represented by Ramey LLP.

The key attorneys identified from Ramey LLP who frequently represent Linfo IP, LLC in patent infringement cases are:

• William P. Ramey III (Lead Counsel)
  • Firm: Ramey LLP, Houston, Texas office.
  • Experience: Mr. Ramey is a Managing Partner at Ramey LLP and is well-known in NPE litigation circles for asserting patents across multiple technology sectors. Ramey LLP emphasizes efficient practice management, innovative technologies, and skilled professionals in their litigation approach. The firm has handled numerous patent infringement cases, including obtaining multi-million dollar verdicts for patent holders and successful defense verdicts in other cases. Ramey LLP has filed several lawsuits on behalf of Linfo IP, LLC involving patents related to text discovery and data organization technologies.

The search results continue to focus on the plaintiff and the general case details, but still do not identify specific defense counsel for Air Oasis, LLC or TekZoom, Inc. The PacerMonitor result for case 3:24-cv-03193 only shows filings by the plaintiff as of December 19, 2024. This implies that either the defendants have not yet made an appearance (unlikely given the date), or the public search results are not detailed enough to reveal that information. Without direct PACER access, it's difficult to get precise docket entry information on appearances.

Therefore, I must explicitly state that defense counsel has not been identified through the available public search results.

Defendant Representatives

As of June 1, 2026, the counsel of record representing defendants Air Oasis, LLC and TekZoom, Inc. in Linfo IP, LLC v. Air Oasis, LLC et al. (Northern District of Texas, Case No. 3:24-cv-03193) has not been publicly identified through the available web search results. While the lawsuit was filed on December 19, 2024, no docket entries or legal news articles found explicitly name the attorneys or firms representing the defendants. Without direct access to the court's PACER system, specific appearances by defense counsel cannot be confirmed at this time.The previous searches, while confirming the case details and plaintiff's counsel, have not yielded any information about the defendants' legal representation. This suggests that either the information is not publicly available through general web searches, or it requires direct PACER access which is not possible in this environment. Given the filing date (December 19, 2024), it is highly probable that defense counsel has appeared by now.

I need to explicitly state that the counsel of record for the defendants has not been identified based on the available information.Defendant Representatives

As of June 1, 2026, the counsel of record representing defendants Air Oasis, LLC and TekZoom, Inc. in Linfo IP, LLC v. Air Oasis, LLC et al. (Northern District of Texas, Case No. 3:24-cv-03193) has not been publicly identified through the available web search results. While the lawsuit was filed on December 19, 2024, no docket entries or legal news articles found explicitly name the attorneys or firms representing the defendants. Without direct access to the court's PACER system or more detailed public docket information, specific appearances by defense counsel cannot be confirmed at this time.