Sullivan & Worcester

Sullivan & Worcester is a global, mid-sized law firm with approximately 200-220 attorneys, headquartered in Boston, MA. The firm maintains additional offices in London, New York, Tel Aviv, and Washington, D.C.. Sullivan & Worcester is recognized as a leading AmLaw 200 firm and has received national and regional rankings in the 2026 Best Law Firms® listings, being among the top 3.8 percent of law firms nationwide.. The firm and its attorneys are also highly ranked by Chambers USA and The Legal 500 United States across various practice areas..

The firm's IP Litigation Group defends intellectual property rights across federal and state courts, encompassing patent, copyright, trademark, and trade secret litigation, as well as inventorship and licensing disputes.. They represent diverse clients, including domestic and foreign consumer product, hospitality and entertainment, media, high-tech, and life sciences companies, ranging from publicly traded multinational corporations to startup ventures.. Their patent litigation experience includes defending against patent assertion companies, with specific engagement in cases involving digital file management, software for networked devices, website operations, and credit/trust score calculation technologies..

Sullivan & Worcester engages in patent litigation representing both patent owners and defendants.. In a notable case, eDekka LLC v. 3Balls.com, Inc., Sullivan & Worcester successfully defended a client against allegations of patent infringement. The court in the Eastern District of Texas found the asserted patent, related to storing and retrieving information, to claim an unpatentable abstract idea and describe routine tasks, leading to the dismissal of 168 related cases filed by eDekka LLC.. The court subsequently declared the case "exceptional" and awarded attorneys' fees to the defendants, noting eDekka's "insupportable arguments on behalf of an obviously weak patent.".

While the firm's Intellectual Property Group is ranked in the 2025 edition of the World Trademark Review 1000 for trademark prosecution and strategy, information regarding a significant or high-volume practice before the Patent Trial and Appeal Board (PTAB) for patent-specific Inter Partes Reviews (IPRs) or Post-Grant Reviews (PGRs) is not readily available in publicly sourced reports.. Key partners in the firm's IP Litigation practice include Kimberly Herman, Michael S. Palmisciano, Christopher K. Shields, Gerry Silver, and Nicholas G. O'Donnell..