U.S. Sup. Ct.
12-1128
Petitioner Medtronic, Inc., designs, makes, and sells medical devices. Respondent Mirowski Family Ventures, LLC, owns patents relating to implantable heart stimulators. They have a licensing agreement that permits Medtronic to practice certain Mirowski patents in exchange for royalty payments, and that specifies procedures to identify products covered by the license and to resolve disputes between the parties. Pursuant to those procedures, Mirowski notified Medtronic of its belief that several of Medtronic’s products infringed the licensed patents, and Medtronic then challenged that assertion of infringement in a declaratory judgment action, while accumulating disputed royalties in an escrow account for distribution to the prevailing party. The District Court concluded that Mirowski, as the party asserting infringement, had the burden of proving infringement and that Mirowski had not met that burden. The Federal Circuit disagreed. It acknowledged that a patentee normally bears the burden of proof, but concluded that where the patentee is a declaratory judgment defendant and, like Mirowski, is foreclosed from asserting an infringement counterclaim by the continued existence of a licensing agreement, the party seeking the declaratory judgment, namely Medtronic, bears the burden of persuasion.
