Casalonga & Josse, the patent and trade mark prosecution arm of the Casalonga group, boasts a team with technical expertise unmatched by most of its competitors. Attorneys Murielle Robert-Le-Meur, a microbiologist from Institut Pasteur, and Muriel Derrien, a pharmaco-chemist from Harvard Medical Institute, add to the depth and success rate of the firm's biotechnology practice. Led by senior partner Gérard Dossmann, Casalonga & Josse represented Millenium Pharmaceuticals in maintaining an important humanised monoclonal antibody patent against opposition raised by Elan Pharmaceuticals and Amgen, as well as acting for Takeda Pharmaceutical in the defence of an innovative pioglitazone-based combination drug against Teva Phramaceutical.