Stephen Duffield is a partner in the life sciences team at Carpmaels & Ransford. His work has a particular focus on biological therapies, often contentious and involving complex immunological aspects in their mechanisms of action. His involvement on these matters ranges from coordination and support roles on pan-European litigations, attacking and defending patents in EPO opposition proceedings and on appeal, through to pressure-testing patents before their assertion in litigation, as well as the immuno-oncology arena. Duffield has an extensive prosecution and advisory practice relating to patent applications in Europe and across the globe.