"By joining the Open Invention Network, Microsoft is offering its entire patent portfolio to all of the open-source patent consortium's members."

https://www.zdnet.com/article/microsoft-open-sources-its-ent...

Apple had "1,996 total patents granted between July 1, 2019 and June 1, 2020, more than any other company in Silicon Valley."

https://www.bizjournals.com/sanjose/news/2020/07/27/top-of-t...