Ariad Sues Amgen, Wyeth Over Enbrel

By Erik Larson · April 16, 2007, 12:00 AM EDT

Expanding an already contentious biotechnology dispute, drug maker Ariad Pharmaceuticals Inc. has filed a new patent infringement lawsuit against rivals Amgen Inc. and Wyeth over Amgen's popular anti-arthritis drugs, Enbrel and...

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