Düsseldorf/Espelkamp. Together with the Chairmen of the German Amusement and Vending Machine Industry Association (VDAI) Paul Gauselmann and Uwe Christiansen, Prof. Dr. Kurt Biedenkopf, former German state president, opened the 30th International Trade Fair for Amusement and Vending Machines as this year’s guest of honour on 18th January 2011 in Düsseldorf, the state capital of North-Rhine Westphalia.