Wilson Sonsini Goodrich & Rosati

Wilson Sonsini Goodrich & Rosati is a major AmLaw 50 "BigLaw" firm and a premier legal advisor to technology and life sciences companies. Headquartered in Palo Alto, California, the firm has deep roots in Silicon Valley and has expanded to 18 offices in key technology, business, and regulatory hubs worldwide. Wilson Sonsini is consistently recognized by Chambers and Partners for its intellectual property litigation practice, which counsels clients on complex patent disputes, IP portfolio management, and technology transactions. Vault ranks the firm among the top 10 for intellectual property, noting it is a go-to firm for tech industry clients.

The firm's patent litigation practice is concentrated in the technology and life sciences sectors, including semiconductors, software, medical devices, and pharmaceuticals. The tracked case, Greenthread Ltd v. Monolithic Power Systems Inc, reflects this focus, with the firm defending a major semiconductor company. While the provided data shows a defendant-side appearance, public filings and firm announcements demonstrate a balanced practice representing both plaintiffs and defendants. Wilson Sonsini has secured significant victories for patent holders, including a jury verdict for Cyntec against Chilisin over semiconductor technology and a damages trial win for Epistar against Lowe's concerning LED technology. The firm also has a strong record defending clients, achieving a complete jury victory for Scale Computing against DataCore Software in a patent infringement trial.

Wilson Sonsini has a highly regarded practice before the Patent Trial and Appeal Board (PTAB). The firm's IP litigators frequently leverage inter partes review (IPR) and other post-grant proceedings as part of their defense strategy, as seen in the Greenthread v. Monolithic Power Systems case, which was stayed pending PTAB review. The firm is nationally ranked as a leader in representing petitioners before the PTAB, and on November 19, 2025, it successfully secured PTAB institution of five IPRs filed on behalf of Azurity Pharmaceuticals.

The patent litigation practice includes several prominent attorneys. James C. Yoon is a leader of the patent trial and litigation practice, with over two decades of experience and having litigated more than 200 patent cases. Michael T. Rosato is a partner who leads the firm's practice for contested proceedings before the USPTO and has been individually ranked as a top attorney for representing litigants in PTAB proceedings. Vera M. Elson, now a retired partner, was a lead trial lawyer with decades of experience in high-stakes patent cases. Garrett T. Potter is an associate in the patent litigation group whose practice also focuses on PTAB proceedings.