RakNet

I have no idea but another case is RakNet (another Facebook property, via Occulus). It even uses the older, more controversial wording: https://github.com/facebookarchive/RakNet/blob/master/PATENT... And I'd find it highly unlikely it contains any patents too. Occulus was bought in March 2014 by Facebook and RakNet was bought in April 2014 by Occulus and there is only a handful of commits on GitHub that don't seem substantial at all and are just maintenance and cleaning up the repo. RakNet operated for years before that so it's unlikely they happen to have had a patent in it at the time of its purchase or they'd be nuked by Facebook before. Then again, there are/were patents for some bit tricks and Carmack's Reverse so anything is possible.

I'm neither and English isn't my first language (not that legalese is even close to any sane kind of English from last 200 years..) but due to my deep interest in Free and Open software, old games reimplementations, abandonware, reverse engineers and emulation I spent quite a while reading about legal stuff. The part you said is important sounds like you lose the right to use the patent in the given software if you attempt to sue someone over patents in that software which sounds absolutely sane. In facebook's case they terminate the patent grant given to you for you trying to sue them for any patent, except a counterclaim if they sue first: https://github.com/facebook/react/commit/b8ba8c83f318b84e429... And even that is just few years ago, RakNet that Facebook owns via Occulus is still using the old wording: https://github.com/facebookar

RakNet does that too (it's owned by Facebook via Occulus for a while now, Facebook bought Occulus then Occulus bought RakNet): https://github.com/facebookarchive/RakNet/blob/master/PATENT... Is this widespread at all or is it just Facebook..? Edit: I'm glad to be downvoted for asking a genuine fucking question if anyone else does this since Apache mentions Facebook and the only place I ran into PATENTS file is another Facebook property and googling brings nothing up except more React..