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The Wisconsin Alumni Research Foundation (WARF) is accusing Apple of allegedly infringing a patent that covers technology the company has used in the A7 64-bit mobile chip that’s found in many 2013 iOS devices including the iPhone 5s, the iPad Air and the Retina iPad mini. A lawsuit against Apple was filed in the Wisconsin Western District Court, Madison Office, Patently Apple reports. The patent in question – U.S. Patent No. 5,781,782: “Table Based Data Speculation Circuit for Parallel Processing Computer – was awarded to WARF in mid-July 1998, and its inventors are “leading researchers in the field of computer microprocessor architecture,” the publication writes, adding that “their work at the University of Wisconsin—Madison, particularly the work for which they