Was the cheeseburger invented in Denver?

Was the cheeseburger invented in Colorado? According to State Historian Bill Convery, “Whether or not someone else put a piece of cheese on ground beef before 1935 can’t be said, but Denver business owner Louis Ballast trademarked the name ‘cheeseburger.'” He claimed to have “invented” the burger at his Humpty Dumpty Drive-in restaurant. History Colorado needs your help to preserve and tell the state’s great stories. Donate today at www.givehc.org. (photo courtesy Rocky Mountain News)