Valve has recently been ordered to pay 4 million USD in damages after they knowingly infringed on patents owned by Ironburg Inventions with the Steam Controller rear grip button design. Ironburg Inventions is the IP-holding arm of controller manufacturer SCUF who was acquired by Corsair in late 2019. Valve was warned by Ironburg Inventions in 2014 that their Steam Controller infringed on their patent relating to rear-side control surfaces. Valve ignored the warning and went on to produce 1.6 million units before discontinuing the device in 2019. The Jury awarded Ironburg Inventions 4 million USD in damages and found that Valve willfully infringed on Ironberg's patents which opens them up to further litigation. Corsair has published a statement on the case which can be found below.