"Brulotte v Thys Co.", established that attempting to collect royalties after a patent expired was misuse. Mr. Brulotte purchased a hop-harvesting machine from Thys Co. Upon purchase, Brulotte accepted a licensing agreement which required annual royalty payments beyond the duration of the Thys patent. When Brulotte realized that the terms of the contract exceeded the duration of the patent, he stopped paying the royalties. The Supreme Court held that the contract between Brulotte and Thys was not enforceable once the last licensed patent expired, because the license extended the term of patent protection beyond the duration of the patent. In June 2015, the Supreme Court reaffirmed the "Brulotte" case.