Smart ring maker Oura has sued Indian rival Ultrahuman again, seeking to block U.S. sales of its Ring Pro (pictured above) just months after the redesign helped the Bengaluru-based startup return to the American market following an import ban. The case is the latest in a string of patent disputes Oura has brought against competing smart ring makers, including Samsung and RingConn. In a complaint filed Thursday in a federal court in Texas, Oura alleged that Ultrahuman's Ring Pro infringes two of its patents covering the ring's design and internal components, including its battery and sensors. Oura is seeking monetary damages and a permanent injunction that would stop Ultrahuman from selling the ring. Ultrahuman's redesigned Ring Pro, launched in February, received a favorable ruling from U.S. Customs and Border Protection in March, paving the way for the startup's return to the U.S. market. The decision followed an import ban on Ultrahuman's earlier Ring Air, which took effect after...
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