Zepp North America Inc et al. v. Oura Health Oy

Wearables Clash as Zepp Sues Rival Oura in Texas Patent Hub

In a battle between two major players in the burgeoning wearable health technology market, Zepp North America Inc. and its parent Zepp Inc. have filed a patent infringement lawsuit against Finnish competitor Oura Health Oy. Filed on April 21, 2026, the suit accuses Oura's popular smart rings and companion mobile application of infringing six of Zepp's patents. Both parties are established operating companies, not patent assertion entities, positioning this case as a direct strategic dispute between competitors. Zepp, formerly known as Huami, develops and sells a range of smart wearable devices under brands like Amazfit and Zepp, powered by its proprietary health data platform. Oura is the creator of the Oura Ring, a prominent device that tracks sleep and physical activity, and has raised significant capital to become a leader in the smart ring category.

The lawsuit targets Oura's entire product ecosystem, specifically naming the Oura Ring Gen 3, the recently launched Oura Ring Gen 4, and the Oura Application as the accused infringing products. Zepp alleges this system infringes on a diverse portfolio of six U.S. patents. The asserted patents cover a range of technologies critical to wearable devices, including methods for sleep monitoring using micro-activity detection (U.S. Patent 10,959,649), techniques for calibrating stride length (U.S. Patent 11,806,120), and processes for calculating a health risk score (U.S. Patent 10,624,575). The other patents-in-suit relate to recognizing motions in ball games (U.S. Patent 8,781,610), transmitting data with reduced power consumption (U.S. Patent 9,729,693), and measuring sensor confidence (U.S. Patent 8,989,441).

The case was filed in the U.S. District Court for the Eastern District of Texas and has been assigned to Judge Rodney Gilstrap, the nation's busiest patent judge. This venue is highly notable in the world of patent litigation. For years, the Eastern District of Texas was known as a "rocket docket" favorable to patent plaintiffs due to its speed, experienced judiciary, and local rules. After a dip in filings following the Supreme Court's 2017 TC Heartland decision on venue, the district has recently surged back to become the top forum for patent cases in the United States. The selection of this court and judge signals a strategic choice by Zepp. The lawsuit is significant as it represents a direct confrontation between two key innovators in the competitive and rapidly growing smart ring and wearable health market, where intellectual property rights are a critical battleground.

Legal Developments & Case Status (as of 2026-05-02)

As of May 2, 2026, the patent infringement litigation between Zepp and Oura is in its nascent stages, with no significant legal developments occurring in the eleven days since the complaint was filed. The case docket consists only of the initial filing, and the defendant, Oura Health Oy, has not yet formally responded.

Filing & Initial Pleadings

• 2026-04-21: Complaint Filed: Zepp North America Inc. and its parent, Zepp Inc., filed a complaint for patent infringement against Oura Health Oy in the U.S. District Court for the Eastern District of Texas (Case 2:26-cv-00316). The complaint alleges that Oura's Ring Gen 3, Ring Gen 4, and the companion Oura Application infringe upon six U.S. patents related to wearable health technology. The case was assigned to Judge Rodney Gilstrap.
• Answer and Counterclaims: Oura Health Oy's answer to Zepp's complaint is not yet due and has not been filed. Under the Federal Rules of Civil Procedure, a defendant typically has 21 days to respond after being served with the summons and complaint. Any counterclaims Oura may assert against Zepp would be filed along with its answer.

Pre-Trial Motions and Other Developments

• No Substantive Motions Filed: A review of the case docket and legal news reporting reveals no substantive pre-trial motions have been filed by either party. This includes any motions to dismiss, transfer venue, or stay the proceedings.
• Current Status: The case remains open and is in the preliminary pleading stage.

Parallel PTAB Proceedings

• No IPR Petitions Found: A search of the U.S. Patent and Trademark Office's Patent Trial and Appeal Board (PTAB) records does not indicate that Oura Health Oy has filed any petitions for inter partes review (IPR) or other post-grant challenges against the six patents asserted by Zepp. It is still very early in the litigation, and such defensive filings often occur later as a case progresses.

Strategic Context: The Litigation Counterpunch

This lawsuit by Zepp did not arise in a vacuum and is best understood as a strategic countermove in a larger intellectual property battle between the two wearable technology companies.

• Prior Oura-Initiated Actions: In late 2025, Oura launched a broad legal campaign to enforce its own patent portfolio. This included filing a complaint with the U.S. International Trade Commission (ITC) against several competitors, including Zepp Health (maker of the Amazfit line), seeking an import ban on rival smart rings. Oura's aggressive enforcement has already resulted in licensing deals with some companies and market exclusion for others.
• Zepp's Texas Lawsuit as Retaliation: Legal analysts view Zepp's new lawsuit in the Eastern District of Texas as a direct response to the legal pressure initiated by Oura. By asserting its own patents against Oura's flagship products, Zepp is creating leverage, escalating the dispute into a two-way patent battle, and aiming to pressure Oura into a broader settlement or cross-licensing arrangement. This "counterpunch" strategy is common in high-stakes technology disputes.

Plaintiff Zepp Represented by Irell & Manella and Capshaw DeRieux

Zepp North America and its parent company have enlisted a formidable legal team from the high-stakes patent litigation firm Irell & Manella, supported by well-known local counsel from Capshaw DeRieux, for their patent infringement lawsuit against Oura Health Oy. The initial complaint identifies a team of renowned trial attorneys from Irell & Manella's California offices and experienced East Texas litigators.

The counsel of record for Plaintiff(s) Zepp North America Inc. and Zepp Inc. are:

• Morgan Chu | Lead Counsel

  • Firm: Irell & Manella LLP (Los Angeles, CA)
  • Note: A legendary trial lawyer, Chu has secured over $9 billion for clients in verdicts and settlements and is widely regarded as one of the top IP litigators in the nation.

• Jason Sheasby | Lead Counsel

  • Firm: Irell & Manella LLP (Los Angeles, CA)
  • Note: Named "Litigator of the Year" by The American Lawyer, Sheasby has secured numerous nine-figure verdicts in the Eastern District of Texas for clients like PanOptis and USAA.

• Elizabeth L. DeRieux | Local Counsel

  • Firm: Capshaw DeRieux, LLP (Gladewater, TX)
  • Note: DeRieux is an experienced litigator who frequently serves as local counsel in the Eastern District of Texas for major patent cases.

As the case is only in its earliest stage, this list reflects the attorneys who filed the initial complaint. Additional attorneys from these firms or others may file notices of appearance as the litigation progresses. There is no indication of in-house counsel for Zepp having formally appeared on the docket at this time.

Counsel for Oura Health Not Yet Formally on Record, But Perkins Coie Team Expected to Lead Defense

As of May 2, 2026, defendant Oura Health Oy has not yet filed a notice of appearance or any responsive pleading in the patent infringement case brought by Zepp in the Eastern District of Texas. With the complaint having been filed just eleven days ago, this is standard, as the deadline to respond has not yet passed.

While no attorneys are formally on the docket for Oura in this matter, the company has been actively engaged in other high-stakes patent disputes, providing a clear indication of its likely legal representation. In its own recent patent enforcement actions, including a prominent U.S. International Trade Commission (ITC) investigation and parallel district court cases against competitors like Zepp and Samsung, Oura has consistently retained a team from the national law firm Perkins Coie LLP. This same team is widely expected to defend Oura in the current lawsuit initiated by Zepp.

Based on counsel in related and recent patent litigation, the anticipated defense team for Oura Health Oy includes:

• Michael O. Warnecke | Likely Lead Counsel

  • Firm: Perkins Coie LLP (Chicago, IL)
  • Note: A veteran first-chair trial lawyer and former firmwide co-chair of the Patent Litigation practice, Warnecke has secured major victories for clients like Caterpillar and Riddell.

• Kevin S. Patariu | Likely Lead Counsel

  • Firm: Perkins Coie LLP (San Diego, CA)
  • Note: Patariu is a seasoned patent litigator with extensive experience in the electronics and software sectors, frequently representing clients in district courts and at the ITC.

• Christina M. Peloquin | Likely Counsel

  • Firm: Perkins Coie LLP (Denver, CO)
  • Note: Peloquin focuses on intellectual property litigation, with an emphasis on patent disputes involving complex technology in the computer science and electronics fields.

• Local Counsel (Anticipated)

  • Firm: To Be Determined (Tyler or Marshall, TX)
  • Note: Oura will be required to retain a Texas-based attorney to serve as local counsel in the Eastern District. This appearance will be made along with the lead counsel from Perkins Coie when Oura formally responds to the complaint.

This information is based on Oura's selection of counsel in its prior legal actions against Zepp and others. The formal appearance of these or other attorneys on the docket for Case 2:26-cv-00316 is expected in the coming weeks.