Haynes and Boone

Haynes and Boone, LLP is an AmLaw 200 firm headquartered in Dallas, Texas, operating as a full-service international law firm. With over 600 lawyers across offices in the United States, Europe, and Asia, including major hubs in New York, California, Washington D.C., London, Mexico City, and Shanghai, the firm holds a significant presence in the global legal market, ranking #86 in the AmLaw 200 list. Its intellectual property practice group alone comprises approximately 100 lawyers.

The firm's patent litigation practice specializes across a broad spectrum of high-technology sectors. This includes areas such as computer software, information security, networking equipment and protocols, telecommunications equipment and standards, semiconductor devices and fabrication, energy, imaging systems, and automotive technologies. Based on tracked appearances, Haynes Boone primarily represents operating companies in patent disputes, with 16 cases on the plaintiff side compared to 7 on the defendant side, often defending against claims of infringement and enforcing patent rights.

Haynes Boone has a particularly robust and nationally recognized Patent Office Trials practice. The firm is consistently ranked as a top 10 firm for filing Inter Partes Reviews (IPRs) on behalf of petitioners, demonstrating high activity and strong performance before the Patent Trial and Appeal Board (PTAB). Its attorneys have been involved in over 700 IPR and Post-Grant Review (PGR) proceedings, frequently complementing or shaping district court litigation. For instance, in Patexia's 2025 PTAB Intelligence Report, Haynes Boone was ranked #2 for Best Performing Law Firm (Petitioner) and #4 for Most Active Law Firm (Petitioner).

Key figures in the patent litigation team include Jonathan R. Bowser, Partner and Head of the Patent Office Trials Practice Group, who is recognized as a highly active and successful PTAB attorney. David L. McCombs, Chair of Intellectual Property Litigation, is also a prominent partner with significant PTAB activity. Other active practitioners include Angela Oliver and Theodore M. Foster, recognized for their strong performance in PTAB proceedings. The firm's notable client representations in patent cases include Intel, Cisco Systems, Apple, and Tesla.