In Neonode Smartphone LLC v. Samsung Electronics Co., Ltd., No. 2023-2304 (Fed. Cir. Aug. 20, 2024), the Federal Circuit concluded that the district court erred by finding indefiniteness merely from multiple possible interpretations of “only one option,” and held that while a term may not appear in the specification, its meaning can be sufficiently clear through prosecution history distinguishing prior art to provide reasonable certainty to a POSITA about the claimed scope.