New 'trolls' are crushing innovation in biopharma By: CNBC.com News July 22, 2015 at 10:16 AM EDT Hedge funds and and a new type of patent troll are using loopholes in patent law for gains, stifling innovation, says author Joseph Gulfo. Read More >> Related Stocks: Acorda Therapeutics Allergan Plc Celgene Corp Shire Plc Ads