Why Amgen vs. TKT Matters

Amgen's patent infringement lawsuit against Transkaryotic Therapies is probably the most important of its kind, and not merely because the product Amgen is trying to protect, erythropoietin, is the company's--and the biotech industry's--biggest revenue generator. This lawsuit, although not yet decided, already offers some valuable lessons both in developing a patent portfolio and defending a patented product.