X One Inc v. DoorDash Inc et al.

Case Background: NPE Targets On-Demand Delivery Giant in Patent-Friendly Texas Forum

In a case with significant implications for the on-demand delivery industry, non-practicing entity (NPE) X One Inc. has filed a patent infringement lawsuit against DoorDash, Inc., a leader in the U.S. food delivery market. The suit, filed on April 17, 2026, in the U.S. District Court for the Eastern District of Texas, alleges that DoorDash's mobile application and the complex backend ecosystem that supports its delivery services infringe upon five of X One's patents related to location-sharing and mapping technology. The plaintiff, X One Inc., operates as a patent assertion entity, a business model centered on licensing and litigating patents rather than producing goods or services. DoorDash is a major operating company in the high-tech and logistics sector, known for its extensive platform connecting consumers, restaurants, and delivery drivers.

The lawsuit targets the core of DoorDash's technology platform—specifically, the systems and software that enable customers to track orders in real-time. This includes the mobile app, server-side processing, and GPS-based location services that allow a user to see the location of their delivery driver on a map. X One asserts a family of patents that it claims covers these fundamental features. The patents at issue generally describe methods for creating temporary groups of mobile devices, allowing them to share location data, and displaying that information on a map. The asserted patents are:

• U.S. Patent No. 9,854,402: Systems and methods for creating and managing temporary location-sharing groups of mobile devices.
• U.S. Patent No. 10,299,071: A method for a mobile device to graphically display location information of other devices in a shared group.
• U.S. Patent No. 9,942,705: A method for transmitting a map that includes the plotted locations of selected devices within a location-sharing group.
• U.S. Patent No. 11,778,415: Systems for sharing real-time location information between a mobile device and a central server.
• U.S. Patent No. 10,750,310: A server-based method for managing and transmitting location data for a temporary group of mobile devices.

The case (2:26-cv-00312) is strategically filed in the Eastern District of Texas, a venue that has historically been, and has recently re-emerged as, a top forum for patent litigation, particularly for NPEs. The district is known for its experienced patent judges and local procedures that can be favorable to plaintiffs, often leading to faster trial timelines which can pressure defendants to settle. This case is notable not only because it targets a household name in the "gig economy," but also because it is part of a broader litigation campaign by X One. On the same day, X One filed nearly identical lawsuits in the same court against other major players in the food delivery and services industry, including Domino's Pizza and Pizza Hut, asserting the same patents. This follows X One's previous litigation involving similar location-tracking patents against Uber, which resulted in a Federal Circuit decision finding claims of a related patent obvious. This pattern of targeting multiple companies in a successful industry sector with the same patent portfolio is a hallmark of NPE litigation strategy.

Litigation Developments: Case in Early Stages

As of May 1, 2026, the patent infringement litigation between X One Inc. and DoorDash is in its earliest procedural phase. Having been filed on April 17, 2026, there have been no substantive rulings, hearings, or significant motion practice. The key events to date are limited to the initiation of the lawsuit.

Filing & Initial Pleadings (Chronological)

• 2026-04-17: Complaint Filed. X One Inc. filed its patent infringement complaint against DoorDash, Inc. and DoorDash Essentials LLC in the U.S. District Court for the Eastern District of Texas. The complaint asserts that DoorDash's mobile app and supporting backend systems infringe upon five U.S. patents: 9,854,402; 10,299,071; 9,942,705; 11,778,415; and 10,750,310. On the same day, X One Inc. filed nearly identical lawsuits asserting the same patents against Domino's Pizza (2:26-cv-00311) and Pizza Hut.
• 2026-04-17: Summons Issued. Summons were issued for the defendants, DoorDash, Inc. and DoorDash Essentials LLC. This marks the formal start of the process for notifying the defendants of the lawsuit.
• Answer and Counterclaims Pending. As of May 1, 2026, DoorDash has not yet filed its answer or any counterclaims in response to the complaint. Under the Federal Rules of Civil Procedure, a defendant typically has 21 days after being served with the summons and complaint to file a response. This deadline has not yet passed.

Pre-Trial Motions and Other Proceedings

• No Substantive Motions Filed. There have been no motions to dismiss, transfer venue, or stay the case filed by either party. Such motions are common early responses from defendants in patent cases but have not yet appeared on the docket.
• No Parallel PTAB Proceedings Initiated. A search of the U.S. Patent and Trademark Office's Patent Trial and Appeal Board (PTAB) records indicates that DoorDash has not yet filed any petitions for Inter Partes Review (IPR) to challenge the validity of the five asserted patents. Defendants often file IPRs as a parallel strategy to district court litigation, but this typically occurs several months into a case. The statutory deadline for a defendant to file an IPR is one year from the date they are served with an infringement complaint.

Current Posture and Expected Next Steps

The case remains in its infancy, with the next significant event expected to be DoorDash's formal response to the complaint. This response could be an answer addressing the allegations, or it could come in the form of pre-answer motions, such as a motion to dismiss under Rule 12(b)(6) for failure to state a claim or a motion to transfer the case to a different venue, like the Northern District of California where DoorDash is headquartered. Following the defendant's response, the court will likely issue a scheduling order to set deadlines for claim construction, discovery, and dispositive motions, moving the litigation into its next phase.

Plaintiff X One Inc. Represented by Stamoulis & Weinblatt

The counsel of record for plaintiff X One Inc. in its patent infringement lawsuit against DoorDash are the founding partners of the Delaware-based intellectual property firm Stamoulis & Weinblatt LLC. The firm specializes in patent litigation and frequently represents patent holders in federal courts, including the Eastern District of Texas and the District of Delaware.

Based on court filings and the firm's history, the legal team for X One Inc. is identified as follows:

• Stamatios "Sam" Stamoulis

  • Role: Lead Counsel
  • Firm: Stamoulis & Weinblatt LLC (Wilmington, DE)
  • Noteworthy Experience: Has over two decades of experience in IP litigation, having previously practiced at O'Melveny & Myers LLP and Fish & Richardson P.C. before co-founding his current firm. He has litigated patent cases for both practicing and non-practicing entities in various technology sectors across the country.

• Richard C. Weinblatt

  • Role: Lead Counsel
  • Firm: Stamoulis & Weinblatt LLC (Wilmington, DE)
  • Noteworthy Experience: A registered patent attorney with over 20 years of experience, he previously worked at Fish & Richardson, P.C. and successfully argued for the reversal of a patent ineligibility (§ 101) dismissal before the Federal Circuit in Visual Memory, LLC v. NVIDIA Corp. (2017).

Both attorneys are listed on the complaint filed on April 17, 2026. Their firm, Stamoulis & Weinblatt, regularly acts as lead counsel for plaintiffs in patent infringement cases. The firm has represented another non-practicing entity, Blackbird Technologies, in patent litigation. It is also worth noting that X One Inc. has been involved in prior litigation against other major technology companies, including Uber, concerning related location-tracking patents.

Counsel for DoorDash Has Not Yet Appeared

As of May 3, 2026, counsel for defendants DoorDash, Inc. and DoorDash Essentials LLC has not yet filed a notice of appearance in this case. The lawsuit was filed on April 17, 2026, and summons were issued the same day. Under the Federal Rules of Civil Procedure, a defendant has 21 days after service to file an answer or other responsive pleading, and it is common for counsel to make their first appearance at that time.

While no attorneys are officially on the record for this specific case, DoorDash has retained prominent national law firms for other recent patent infringement matters. Based on prior litigation, it is possible that counsel from one of these firms could appear in this case:

• In a patent case brought by WirelessWerx IP, LLC that was dismissed in July 2024, DoorDash was represented by attorneys from Benesch, Friedlander, Coplan & Aronoff LLP and Scott, Douglass & McConnico LLP.
• The intellectual property powerhouse Fish & Richardson P.C., known for its extensive patent litigation experience, is another firm that frequently represents major tech companies in high-stakes patent disputes.
• Quinn Emanuel Urquhart & Sullivan, LLP is another top-tier litigation firm with a significant patent practice that often represents large technology companies in infringement cases.

This section will be updated once defense counsel formally appears on the docket for X One Inc v. DoorDash Inc et al., 2:26-cv-00312.