WASHINGTON, D.C. - A Wisconsin federal magistrate judge did not err in granting a summary judgment of no contributory infringement with regard to patented optical disc (DVD) technology, the Federal Circuit U.S. Court of Appeals ruled June 11, saying that "recommending one use over another does not mean the non-recommended use is not substantial" (Toshiba Corporation v. Imation Corporation et al., No. 11-1204, Fed. Cir.; 2012 U.S. App. LEXIS 11807).