David M. Sullivan

David M. Sullivan is a Shareholder and the Chair of the Intellectual Property and Technology group at Crowe & Dunlevy, where his practice encompasses intellectual property litigation, procurement, and technology transactions. With a background in chemical engineering, his patent litigation work is primarily focused on energy sector-related technologies, including downhole equipment, secondary production, well stimulation, and refinery technologies. He also handles a broad range of intellectual property matters, such as software licensing, consulting contracts, IP due diligence, and the management of large trademark portfolios.

Sullivan typically represents clients in enforcing patent and trademark rights, serving a diverse clientele from Fortune 500 companies to emerging technology start-ups. His tracked patent litigation appearances include serving as local counsel for a plaintiff in ABC IP, LLC et al. v. LAWRENCE DEGARMO et al. While his firm, Crowe & Dunlevy, represents clients in patent infringement defense, specific details of his individual involvement in such cases beyond general intellectual property litigation are not widely publicized.

Although Mr. Sullivan's firm mentions experience with IPR challenges among its attorneys, specific details of his individual appearances or significant involvement in PTAB/IPR proceedings are not readily available in public records.

Mr. Sullivan earned his B.S. in Chemical Engineering from Oklahoma State University in 1997 and his J.D. from The University of Oklahoma College of Law in 2000. He was admitted to legal practice in Oklahoma in 2000 and is also admitted to practice in other jurisdictions, including the Eastern District of Texas. He has been recognized by Super Lawyers from 2013 to 2025 and listed in Best Lawyers in America across various IP categories since 2009, including being named "Lawyer of the Year" (OKC) for Litigation – Patent in 2016 and 2021, and for Patent Law in 2021.