Oura has filed another patent infringement lawsuit against Ultrahuman, this time targeting the company’s Ring Pro smart ring. The case was filed in a federal court in Texas and also names SVTronics, the manufacturer involved in the dispute.

The new complaint follows an earlier ruling concerning Ultrahuman’s Ring Air, which was found to infringe Oura patents and resulted in restrictions on importing the affected smart rings and components into the United States.

Ultrahuman subsequently introduced a redesigned ring, arguing that its changes addressed the earlier patent concerns. Oura now alleges that the Ring Pro infringes two additional patents covering the ring’s physical design and internal components.

The patents reportedly concern aspects of the ring’s appearance and internal arrangement, including its curved battery, circuit board, magnets, and optical sensor configuration. Oura is seeking monetary damages and a court order that would block US sales of the Ring Pro.

One of the patents cited in the new case was issued on October 20, just two days before the lawsuit was filed. This adds another element to the ongoing legal dispute between the two smart ring manufacturers.

Ultrahuman has maintained that its redesigned product does not infringe the patents covered by the earlier decision and has pursued clearance for its products to enter the US market. However, Oura argues that the redesign does not resolve the concerns raised by its additional patents.

The new case will need to proceed through the US legal system before the allegations are resolved. The lawsuit itself does not automatically establish that the Ring Pro infringes the disputed patents.