I could be wrong and IANAL, but I doubt you&#x27;ll be able to get lawyers for Facebook to spend time on request to figure out which patents might cover a particular piece of code - especially since I think telling you there aren&#x27;t any might let you claim estoppel in the (extremely unlikely) case they actually wanted to sue you.<p>But you can get a list of Facebook&#x27;s patents here:<p><a href="http:&#x2F;&#x2F;stks.freshpatents.com&#x2F;Facebook-Inc-nm1.php" rel="nofollow">http:&#x2F;&#x2F;stks.freshpatents.com&#x2F;Facebook-Inc-nm1.php</a><p>edit: Of course, just because they&#x27;re including patent boilerplate doesn&#x27;t mean anyone actually did this research in the first place or believes that a particular patent covers it; I would be surprised if someone had, as opposed it just being standard boilerplate (although it doesn&#x27;t seem to be on all their projects).  There&#x27;s little reason to worry more about patents on this project than on any other open source project distributed under a BSD license, without an &quot;additional&quot; grant of patent rights.  Not none, but little.