Hilltop Technology filed suit against Apple asserting a patent related to capacitive touch screens (7,864,503). The Hilltop patent, previously marketed as “SensePad,” has a 2007 priority date. Hilltop launched its campaign in September 2013 against display suppliers AU Optronics, TPK, and Wintek. Those cases are currently ongoing. RPX reviewed the patent in June 2013. 1/29, Eastern District of Texas, 2:14cv00050