It gets even more complicated than that. Not even close to all FB IP was developed in US. There is a great deal of custom integrations built across the world, i

It gets even more complicated than that. Not even close to all FB IP was developed in US. There is a great deal of custom integrations built across the world, in smaller offices dedicated to a particular market. Then you have things built in UK (say, Workplace). Then you have the even more complex case when a piece of tech is first developed in US, makes or not some money, then is taken over by an UK team, which tweaks, extends, rebuilds, whatever and makes some more money, then returns to an US team and so on. I can't even phantom how hairy a report detailing the above would look like, how long it will take to make and how long it will take to check said report. You could also argue that is almost impossible to fully check the situation. The people with the skills to check such a report are either working for Facebook, or for a Facebook competitor. Bias either way.