Adam and Noah Brown were American shipbuilders, based in New York City, founded a company with its name based in New York, which was active between 1804 and 1833. They built several notable vessels, including Robert Fulton's Demologos, the first steam-powered warship, and numerous naval vessels on Lake Erie and Lake Champlain, during the War of 1812.

Demologos was the first warship to be propelled by a steam engine. She was a wooden floating battery built to defend New York Harbor from the Royal Navy during the War of 1812. The vessel was designed to a unique pattern by Robert Fulton, and was renamed Fulton after his death. Because of the prompt end of the war, Demologos never saw action, and no other ship like her was built.