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Endo's Opana Patent Survives AIA Challenge By Amneal

By Vin Gurrieri (July 23, 2015, 3:03 PM EDT) -- The Patent Trial and Appeal Board on Wednesday rejected an America Invents Act challenge by Amneal Pharmaceuticals LLC to an Endo Pharmaceuticals Inc. patent related to the painkiller Opana ER, saying the patent wasn't proven to be invalid....

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