John Miller was a prolific inventor who was granted over 100 patents, and invented many of the safety devices used in today's roller coasters, including the 'Safety Chain Dog' and 'Under Friction Wheels'. Miller designed toboggans before starting work at the Dayton Fun House and Riding Device Manufacturing Company, which later became the National Amusement Device Corporation. Together with partner Norman Bartlett, John Miller invented his first amusement ride (patented on October 14, 1926) called the Flying Turns ride. The Flying Turns was the prototype for the first roller coaster ride, however, it did not have tracks. Miller went on to invent several roller coasters with his new partner Harry Baker. Harry Baker built the famous Cyclone ride at Astroland Park, Coney Island.