OKI Data Americas to Showcase Innovative proColor(TM) Series of Commercial-Grade Digital Color Printers at GRAPH EXPO 2012 MOUNT LAUREL, N.J., Oct. 1, 2012 (GLOBE NEWSWIRE) -- OKI Data Americas announces its participation in the upcoming GRAPH EXPO 2012 tradeshow and conference, taking place October 7-10, 2012 in Chicago,...