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Just a few months ago, Oura won a lawsuit against rival smart ring makers Ultrahuman and RingConn. Now, they've initiated proceedings against four more companies—the makers of the Samsung Galaxy Ring, Reebok Smart Ring, Amazfit Helio Ring, and the Luna Ring.

Oura announced on their website that they have filed an ITC complaint against those four companies. The ITC is the U.S. International Trade Commission, and Oura says its complaint is "for the unlawful importation and sale of products that infringe on several of Oura’s patents."

Oura's previous win against Ultrahuman and RingConn resulted in a judgment that those companies had to stop selling and importing their smart rings. RingConn ultimately came to an agreement with Oura to licens

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