Wolf, Greenfield & Sacks

Wolf, Greenfield & Sacks, P.C. is a prominent intellectual property (IP) boutique law firm headquartered in Boston, with additional offices in New York and Washington, D.C.. Recognized as one of the ten largest law firms in the United States exclusively dedicated to IP, the firm employs over 160 legal professionals. Chambers USA ranks Wolf Greenfield in Band 2 for Intellectual Property in Massachusetts, and the firm is consistently acknowledged by publications such as The Legal 500, Managing IP, and IAM Patent 1000. In 2025, it was also recognized as "IP Boutique of the Year" and "Life Sciences Prosecution Firm of the Year" by the LSPN Awards USA.

The firm's patent litigation practice covers a broad range of technology areas, underpinned by a deep bench of technically skilled attorneys; over 90% of its practitioners hold science or engineering degrees, with nearly 70% holding advanced degrees. Specialties include biotechnology, chemical and materials technologies, electrical and computer technologies, mechanical technologies, pharmaceuticals, medical devices, and consumer products. Notable engagements from tracked cases reflect expertise in semiconductors (e.g., Amphenol Corporation v. Credo Technology Group Ltd., Taiwan Semiconductor Manufacturing Company, Ltd. v. Advanced Integrated Circuit Process LLC), software and computer technology (e.g., Google LLC et al. v. ART Research and Technology LLC, Uniloc Luxembourg S.A. v. Mojang AB), and mechanical/medical devices (e.g., HydraFacial LLC v. Aesthetic Management Partners, LLC et al.).

Wolf Greenfield actively represents both plaintiffs and defendants in patent disputes, with a slightly higher incidence of defendant-side engagements in tracked cases (9 defendant-side appearances versus 6 plaintiff-side). The firm has achieved significant outcomes, including securing both an exclusion order and a cease and desist order for Amphenol in a complex, five-patent ITC investigation involving computer technology. For Sony, the firm obtained a favorable ruling from the ITC that an asserted patent was invalid under 35 U.S.C. § 101, a decision later affirmed by the Federal Circuit. Additionally, the firm secured a complete win for defendants in Uniloc Luxembourg S.A. v. Mojang AB, with the district court invalidating all asserted claims under Section 101, which was summarily affirmed by the Federal Circuit.

The firm maintains a robust Post-Grant Proceedings practice before the Patent Trial and Appeal Board (PTAB). The Legal 500 ranks Wolf Greenfield among the top 10 law firms in the U.S. for post-grant proceedings. Patexia's 2020 IPR Intelligence Report ranked the firm among the top five nationally for overall performance and consistently among the most active. As of 2020, Wolf Greenfield's petitioner-side IPRs achieved institution in 83% of cases and successfully eliminated all challenged claims in 84% of cases decided by Final Written Decision. On the patent owner side, the firm preserved all challenged claims in 92% of cases that reached a final PTAB decision without settlement. Key partners in the firm's IP litigation and post-grant practices include Gregory Corbett, who heads the litigation group, and Rich Giunta, Chair of the Post-Grant Proceedings Practice. Other prominent litigation partners include Michael Rader, Adam R. Wichman, Meaghan P. Luster, Joseph A. Agiato, Jr., and Scott McKeown.