 Marshall & Son originally was a Blacksmith, but in the 1840s, they started to produce elevators of all kinds.In 1942, they began to sell elevator products by the Rotary Lift Company, which, in 1955, merged with other companies and changed their name to the Dover Elevator Division.In 1999, they became a reseller of ThyssenDover Elevators, the company that was formed after the merger of Dover Elevator and Thyssen Elevator.