Peter v. NantKwest Inc., 589 U.S. ___ (2019), was a United States Supreme Court case from the October 2019 term. In a unanimous opinion, the Supreme Court ruled that the United States Patent and Trademark Office (USPTO) was not entitled to be reimbursed for attorney's fees from patent applicants who file appeals against USPTO decisions. This case attracted attention from many intellectual property and law associations, many of whom (including the American Bar Association) filed friend-of-the-court briefs arguing against the government's request for attorney's fees from the plaintiff.