AT&T, Ericsson Win Networking Patent Fight Appeal (1)

AT&T Mobility LLC and Ericsson Inc. secured their victory in a patent infringement case by defeating a video tech solutions company’s appeal.

The U.S. Court of Appeals for the Federal Circuit Aug. 12 upheld a lower court’s finding that the companies didn’t infringe Iridescent Networks Inc.'s patent describing a communication system that guarantees on-demand bandwidth and minimizes data delay.

The decision reflects the latest in a line of cases exploring how to interpret terms of degree in patent claims, Steven C. Carlson, an intellectual property attorney at Robins Kaplan LLP in Silicon Valley, said. The court grappled with how to ...