In an unanimous decision, the Supreme Court reversed the Federal Circuit holding that Lexmark exhausted its patent rights in the U.S. despite the contractual restrictions and authorized sales outside the U.S. likewise exhausted any rights. In so ruling, the Court relied on English common law and its own precedence including its recent decision in Kirtsaeng that the limited, exclusive monopoly rights granted to a patentee is exhausted upon the sale of the patented product.
Full text of the opinion is available here.