Oura sues rival Ultrahuman again, threatening its U.S. smart ring comeback

Oura filed a patent infringement lawsuit against Ultrahuman alleging that the Ring Pro device violates two of its patents. The lawsuit was filed in U.S. federal court. Ultrahuman has not publicly responded to the allegations.

• TechCrunch — Oura sues rival Ultrahuman again, threatening its U.S. smart ring comeback

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