https://www.theregister.co.uk/2019/11/20/microsoft_linux_patent_trolls/ > IBM, Microsoft and the Linux Foundation have partnered with the Open Invention Network, a company formed to protect Linux from patent threats, to take on "Patent Assertion Entities", also known as patent trolls. > Specifically, the group will help fund the Open Source Zone of Unified Patents, an organisation which provides legal services to deter "unsubstantiated or invalid patent assertions."