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News Breaks November 1, 2012 07:39 EDT COHR Coherent downgraded to Hold from Buy at Needham Needham downgraded Coherent citing the company's weaker than expected results. News For COHR From The Last 14 Days Check below for free stories on COHR the last two weeks. Sign up for a free trial to see the rest of the stories you've been missing. There are no results for COHR Sign up for a free trial to see the rest of the stories you've been missing.