Medtronic Inc.'s $49.9 billion purchase of Covidien made Colorado the third-largest base of employees for the combined company and a place not likely to see dramatic changes as a result of the deal. The was the take of Chris Cleary, Medtronic's vice president of corporate development, who was key to putting together the deal that closed Monday and made Medtronic the largest medical device company in the world. Medtronic Inc.