Battle of the Smart Rings: Oura Sues Ultrahuman for Patent Infringement — AgainT2Covered by 1 source · first reported by CNET at 27 Oct, 22:30 UTCThe smart ring maker wants to ban the Ultrahuman Ring Pro.policySourcesT2Battle of the Smart Rings: Oura Sues Ultrahuman for Patent Infringement — AgainCNET27 Oct, 22:30