They did, but they started moving away from it. Their big change came two years ago when they opened up their patent portfolio to the Open Invention Network. Th

They did, but they started moving away from it. Their big change came two years ago when they opened up their patent portfolio to the Open Invention Network. That meant any company working with Linux can use their patents without royalties. For more on that see: https://www.zdnet.com/article/what-does-microsoft-joining-the-open-invention-network-mean-for-you/ https://www.zdnet.com/article/what-does-microsoft-joining-th...