On July 10, 2013, TPK America, LLC filed IPR 2013-004333 on U.S. Patent No. 8294677 on Transparent capacitive touch panel and manufacturing method thereof, and IPR2013-00436 on U.S. Patent No. 8330738 on _Capacitive touch panel and electrode structure thereof; The Brinkmann Corporation filed IPR2013-00435 on U.S. Patent No. 8449289 on Multi-gas appliance; and Lumondi Inc. filed IPR 201300432 on U.S. Patent No. 6624843 on Customer image capture and use thereof in a retailing system.