Kathleen’s IP litigation practice focuses on patent, trademark, and copyright cases and disputes for clients ranging from major pharmaceutical companies to start-ups and senior executives. She has litigated and mediated patent cases for technologies including pharmaceuticals, biotechnology, mechanical devices, computers, business methods, printing machines, and photocopiers. Kathleen's intellectual property practice involves license negotiation, arbitration and mediation, and counseling on complex patent matters, such as infringement and validity opinions, patent term extension, indemnities issues, research "safe harbor" issues, and biosimilars.

Kathleen has led trial teams in multibillion- and multimillion-dollar Hatch Waxman pharmaceutical patent litigation, and has served as lead counsel on many cases in both federal and state court. She has also argued successfully before the US Court of Appeals for the First Circuit, and prevailed in appeals before the Federal Court. She is registered to practice before the US Patent and Trademark Office.

Her broad litigation experience includes cases pertaining to admiralty and maritime law insurance coverage, real estate, architecture and engineering, fire damage, and complex business litigation.

Prior to joining Mintz Levin, Kathleen was at a large international law firm, where she served as Co-chair of the Intellectual Property Litigation Group.