The Federal Circuit provided guidance on determining financial damages in patent litigation. It affirmed that the smallest salable patent-practicing unit should be used as the royalty base when apportioning damages. However, it found this principle did not apply in this case where the district court used license negotiation rates as the starting point rather than apportioning from a royalty base. The Federal Circuit also found the district court erred in its analysis of Georgia-Pacific factors because it failed to isolate the benefits of the patent from those of the standard it practiced. The case was remanded for a new reasonable royalty determination.