Join one of our guides for an introductory tour of Hagley's patent model collection. Learn about the history of these fascinating miniature models of invention and the patent process that was established in 1790. The tour begins at the Visitor Center, followed by a ride through the Powder Yards. Visitors receive a guided tour of the current patent model display. Afterward, visitors return to the Powder Yards and are free to tour the rest of the museum on their own. The patent model tour lasts approximately 1 1/2 hours. Advance reservations are recommended.