In a nine to zero decision authored by Justice Breyer, the United States Supreme Court reversed a decision of the Federal Circuit and held that when a licensee seeks a declaratory judgment against a patentee that the licensee’s products do not infringe the licensed patent(s), the patentee bears the burden of persuasion on the issue of infringement.
Petitioner Medtronic, Inc., (“Medtronic”) designs, makes, and sells medical devices. Respondent Mirowski Family Ventures, LLC, (“Mirowski”) owns patents relating to implantable heart stimulators. In 1991, Medtronic and Mirowski entered into a patent-license agreement that allows Medtronic to practice several Mirowski patents in exchange for royalty payments. In 2007, pursuant to terms of the agreement, Mirowski notified Medtronic that it believed several newly released Medtronic products infringed the licensed patents and, therefore, Medtronic owed additional royalties. Medtronic disagreed and challenged Mirowski’s infringement claim in a declaratory judgment action. The District Court (for the District of Delaware) concluded that Mirowski, as the party asserting infringement, bore the burden of proving infringement and that Mirowski had not met that burden. Mirowski appealed to the Federal Circuit.
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