John Fitzgerald Duffy is the Samuel H. McCoy II Professor of Law and the Paul G. Mahoney Research Professor of Law at the University of Virginia School of Law, where he teaches in the fields of administrative law, torts, and intellectual property. He has written articles on a wide variety of subjects, including administrative law, constitutional law, law and economics, patent law, and legal innovation. His works have been published in the Yale Law Journal, Columbia Law Review, University of Chicago Law Review, Virginia Law Review, NYU Law Review, Texas Law Review, University of Pennsylvania Law Review, Supreme Court Review, and other prominent journals. He is the co-author of a widely adopted casebook on patent law.
Duffy received his undergraduate degree in physics from Harvard College and his law degree from the University of Chicago, where he was awarded an Olin Fellowship in Law and Economics and served as articles editor on the University of Chicago Law Review. Prior to entering academia, Duffy clerked for Judge Stephen Williams on the U.S. Court of Appeals for the D.C. Circuit and for U.S. Supreme Court Justice Antonin Scalia, served as an attorney-adviser in the Department of Justice’s Office of Legal Counsel, and practiced law in Washington, D.C.
Duffy was previously on the faculty of the Benjamin N. Cardozo School of Law, the William & Mary Law School, and the George Washington University Law School. He is of counsel at the law firm Hughes Hubbard and Reed, where he regularly consults on appellate cases involving intellectual property and administrative law. He also serves as a public member of the Administrative Conference of the United States.