Though best-known for his "midnight" ride and his work in silver and gold, several of Revere's most significant accomplishments came later in his life. Eager to begin manufacturing other metal products, Revere built an iron and brass foundry in 1787 on the corner of Lynn and Foster Streets in Boston's North End. Revere supported the venture with income from his silversmith shop and financial assistance from his Hichborn cousins.
After several years of producing iron products -- firebacks and window weights -- he began making bolts and spikes for the shipbuilding industry, cannon and bells. The foundry proved to be a forerunner to what would be the most ambitious effort of his life, developing a mill for rolling copper. In 1800 at the age of 65, Paul Revere, motivated by patriotism and profit, and encouraged by a loan from the federal government, purchased and renovated a former gunpowder mill in Canton, Massachusetts for use as a copper rolling mill.
This venture depended on his success at learning a new technology, obtaining scarce raw materials and balancing other variables such as seasonal aspects of water power and the new and somewhat cumbersome federal government. Revere became the first American to successfully roll copper into sheets in a commercially viable manner. His customers included among others, the federal government for its naval vessels, the Commonwealth of Massachusetts for the dome of its new state house, and Robert Fulton who needed heavy copper sheets for boilers for his steamships.