Schwarz Pharma, Inc. and Schwarz Pharma AG (collectively, “Schwarz”) appeal from the order of the United States District Court for the District of Minnesota entering summary judgment of noninfringement of U.S. Patent 4,743,450 (“the ’450 patent”) in favor of Paddock Laboratories, Inc. (“Paddock”). Because the district court did not err in its conclusion that prosecution history estoppel bars resort to the doctrine of equivalents in this case, we affirm the entry of judgment of noninfringement.
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