 After Mudge Rose dissolved in 1995, he joined the international law firm Latham & Watkins LLP, where he would chair their New York Litigation Department until 2004 and serve as head of the New York office's Intellectual Property and Technology Practice Group until 2007.During his four-decade career, Kirby represented a number of notable corporations in legal disputes, among which the likes of PepsiCo., General Foods, and Warner-Lambert.Kirby's most well-known case was "Universal City Studios, Inc. v. Nintendo Co., Ltd." (1984), which he handled while a partner at Mudge Rose.