Re: Q: Default mandatory Licensing in US?
There is no US law that provides for FRAND. FRAND is a contractual agreement entered into voluntarily by companies choosing to participate in a standards process that requires it (as the LTE and 5G standards processes did)
It applies to all companies that agreed to participate all over the world, or at least in any country that enforces contract law. The question isn't over whether FRAND is enforceable, no one disagrees with that. The question is exactly what the terms mean, since there is some potential wiggle room which is where this dispute comes - i.e. whether you can license based on a percentage of the cost of the entire device or only on the cost of the device that implements your IP, and whether you can tie other IP your company owns to that license in an all or nothing fashion.