The dates for the annual Minnesota Inventors Congress have been changed. Beginning next year, the annual invention expo in Redwood Falls will now be held in the month of April. The 56th-annual Minnesota Inventors Congress will take place April 19th and 20th of 2013 at the Redwood Area Community Center. The event gives amateur inventors the opportunity to test market their products at the Invention and Idea Show. The organizers of the expo say that with the change in when the Inventors Congress takes place comes the opportunity for new ideas and new ways of doing business.