Mayer Brown

Mayer Brown is a global BigLaw firm with its headquarters in Chicago, Illinois. The firm maintains an extensive international footprint with offices across the Americas, Europe, Asia, and the Middle East, operating in over 20 cities and 10 countries. As of 2025, Mayer Brown was ranked among the top 50 largest law firms by revenue, coming in at #27 on the AmLaw Global 200 list with 1,766 lawyers, and #44 on the Vault Top 100 law firms in 2026.

Mayer Brown's Intellectual Property litigation practice has a broad scope, frequently handling disputes in federal district courts, the US International Trade Commission (ITC), and the US Court of Appeals for the Federal Circuit. The firm specializes in patent litigation across a diverse array of technologies, including mobile devices, semiconductors, LCD panels, telecommunications, display technologies, consumer electronics, computer software and hardware, medical devices, and pharmaceuticals. Its IP practice also covers trademark and copyright infringement, unfair competition, false advertising, trade secret misappropriation, and IP-related antitrust violations.

The firm demonstrates a balanced approach in its patent litigation practice, having represented defendants in 16 tracked cases and plaintiffs in 9 tracked cases. This includes defending operating companies against patent assertions and prosecuting for patent owners. Notable cases include representing Maxell, Ltd. in actions against Samsung Electronics Co., Ltd. and Lenovo Group Ltd., and Pantech Corporation against OnePlus Technology (Shenzhen) Co., Ltd. The firm also represented LG Display Co., Ltd. as plaintiff in a case against Tianma Microelectronics Co., Ltd. In one instance, Mayer Brown secured a $10.3 million verdict for a Korean cellphone manufacturer.

Mayer Brown has a significant Post-Grant Review (PGR) practice, particularly in inter partes review (IPR) proceedings before the Patent Trial and Appeal Board (PTAB). Several tracked cases show the firm defending patent owners against challenges brought by Unified Patents before the PTAB, including matters involving Samsung Electronics, Maxell Ltd., Powermat Technologies, and Pantech Corp. Robert G. Pluta, a key partner, has been lead counsel in over 100 IPR proceedings.

Key partners in the firm's patent litigation practice include Robert G. Pluta, a trial lawyer with extensive experience in patent disputes across various forums and technologies, who also leads the firm's PTAB efforts. Jamie B. Beaber leads the firm's Section 337 Litigation and Offensive Patent Litigation practices, focusing on patent matters before the ITC and district courts, with significant experience in IPRs covering display and telecommunication technologies. Saqib J. Siddiqui, a former patent examiner, protects patent rights in district courts, the ITC, and the USPTO, with particular expertise in PTAB proceedings and mobile device technologies. James A. Fussell, III (Tripp) is also a prominent attorney, often serving as lead counsel for technology companies in federal district courts, the ITC, and the PTAB, with a focus on simplifying complex technologies for juries.