Intellectual Ventures I LLC v. T-Mobile USA, Inc., No. 17-2434 (Fed. Cir. Sept. 4, 2018)

From the Opinion

The passage below is extracted verbatim from the opening of the document. It has not been editorially summarized — consult the full opinion for the court's complete reasoning.

Intellectual Ventures I LLC (“ IV”) appeals from a grant of summary judgment by the U.S. District Court for the District of Delaware that T -Mobile USA, Inc., T - Mobile US, Inc. , Ericsson Inc., Telefonaktiebolag et LM Ericsson, and United States Cellular Corporation (collec- tively, “T -Mobile”) have not infringed U.S. Patent No. 6,640,248. Because we hold that the district court’s grant of summary judgment resulted from an erroneous claim construction, we vacate and remand. We affirm the district court’s determination regarding indefiniteness.