Alexsam, Inc. v. IDT Corporation, No. 12-1063 (Fed. Cir. May 20, 2013)

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.

Defendant IDT Corporation appeals from the jud g- ment of the District Court for the Eastern District of Texas determining that certain of IDT’s systems infringed claims 57 and 58 of U.S. Patent No. 6,000,608 (“the ’608 patent”), and that these claims were not invalid. Plaintiff Alexsam, Inc. cross -appeals from the court’s judgment determining that certain o ther systems were licensed under claims 57 and 58 of the ’608 patent. We affirm the judgment of no invalidity.