William J. Barrow

• Patent Litigation. Bill represents clients in patent disputes in U.S. district courts throughout the country and in proceedings before the U.S. International Trade Commission. He has experience as lead trial counsel and has litigated on both sides of the proverbial “v.” Bill also manages cross-border disputes involving co-pending patent litigation in the United States and before the European Union's Unified Patent Court (UPC). Bill’s cases span a variety of technologies, including consumer electronics, computer hardware and software, and chemicals.
• Post-Grant USPTO Proceedings. Bill has extensive experience challenging and defending patents in inter partes review (IPR) proceedings before the PTAB and in reexamination before the USPTO. Bill began his career prosecuting electrical and computer software patents, and is often sought out for his understanding of the interplay between litigation and USPTO procedure. His experience in this regard leads to the early identification of favorable case strategies and mechanisms for implementing those strategies in concert with his clients’ business goals.
• Transactional Practice. Bill maintains an active transactional practice that includes patent licensing and other IP-driven deals. He counsels clients on structuring and negotiating license agreements, ensuring that the terms reflect both the commercial realities of the transaction and the underlying strength of the patent assets involved.

Bill is frequently invited to speak and write on complex intellectual property issues, including litigation strategy, licensing, post-grant proceedings before the USPTO, and IP valuation, as well as emerging technologies, including artificial intelligence (AI), blockchain, cryptocurrency, NFTs, and the metaverse. Bill has also held leadership positions in a number of prominent legal/IP organizations. For example, Bill is a former Chair of the American Intellectual Property Law Association’s (AIPLA) Patent Litigation Committee, and presently serves on the organization’s invitation-only Amicus Committee. Bill is also a former Chair of the National Bar Association’s (NBA) IP Section.

Bill has been named a “DC Rising Star” by the National Law Journal for his influence in his practice area, demonstrated leadership qualities, and significant community impact. Bill has also been consistently recognized as a "Rising Star" in intellectual property by Super Lawyers.

• Represented General Motors against allegations of patent infringement regarding vehicle stereo systems in E.D. Tex. Role included managing technical module of case, and developing technical and licensing positions for same; arguing claim terms at Markman hearing; and taking and defending fact and expert depositions.
• Represented Mitsubishi Electric before ITC against allegations of patent infringement regarding Smart TVs. Role included developing technical positions for patents; and taking and defending fact and expert depositions.
• Represented Hyundai and Kia before ITC against allegations of patent infringement regarding in-dash GPS navigation systems. Role included managing technical module of case; managing team of associates on technical and discovery-related issues; and taking and defending fact and expert depositions.

• Co-Chair and Founder of Mayer Brown Black Lawyers (DC)
• American Bar Association
• Federal Circuit Bar Association
• ITC Trial Lawyers Association
• Rebuilding Together DC Alexandria, Board Member