( April 15, 2025, 2:59 PM EDT) -- WASHINGTON, D.C. — In a petition for rehearing, Groupon Inc. says a Federal Circuit U.S. Court of Appeals panel erred when it held that a patent holder was not estopped from asserting infringement claims against Groupon in a Delaware federal court based on previous decisions by the U.S. Patent Trial and Appeal Board (PTAB); Groupon says the panel ignored precedent in the circuit....