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."