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Oura filed a lawsuit against Ultrahuman on October 23, 2026 alleging that the company's Ring Pro smart ring infringes two of its patents, representing an escalation in legal disputes over wearable ring design and functionality in the competitive smart ring market. Oura's challenge comes as Ultrahuman pursues its comeback to the U.S. market with its latest device after an earlier exit from the country. The litigation underscores intensifying competition in the emerging smart ring category, where multiple companies are racing to establish market position with consumers seeking alternatives to traditional smartwatches for health and fitness tracking.