Justia Patents Opinion Summaries

The owner of patents for computer modems and methods of identifying modems licensed the patents to Rockwell; a related agreement gave Rockwell sub-licensing rights. Rockwell reorganized and assigned its rights. The patent owner acknowledged the assignment. Defendants obtain modem chips from a "spin off" of the companies formed in the Rockwell reorganization. The patent owner sued for infringement. The district court held that the defendants are licensed and entered summary judgment that certain patents are invalid. The Federal Circuit reversed in part, first holding that the assignment was within Rockwell's sub-licensing rights without further consent. Two patent claims were invalid for indefiniteness, but there was a material issue of fact on whether two others were invalid for failure to disclose necessary algorithms.