Posts Tagged: "TQ Delta"

On November 23, the Court of Appeals for the Federal Circuit (CAFC) reversed the Patent Trial and Appeal Board’s (PTAB) ruling in a pair of inter partes review (IPR), which had invalidated all claims of two related patents, U.S. Patent Nos. 9,014,243 and 8,718,158. TQ Delta, the patent owner, appealed the PTAB’s holding that all claims of the challenged patents would have been obvious when viewed in light of the prior art references, including U.S. Patent Nos. 6,144,696 (Shively) and 6,625,219 (Stopler), asserted by Cisco System Inc. and the other appellees (collectively, “Cisco”). Admissibility of evidence, claim construction, and due process were among several other challenges raised by TQ Delta on appeal. Because the PTAB’s determination of obviousness was not supported by substantial evidence, the CAFC reversed.