Mealey's (April 30, 2019, 10:13 AM EDT) -- DENVER — A federal judge in Colorado on April 16 ruled that a genuine issue of material fact exists in a hydraulic fracturing patent infringement case because the exact role of the fuel sensor that is in dispute is unclear based on expert testimony (Frac Shack Inc. v. Fuel Automation Station LLC, et al., No. 16-2275, D. Colo., 2019 U.S. Dist. LEXIS 65127)....