Samuel Colt was an American inventor and industrialist, best known for revolutionizing firearms with his patented Colt revolvers.
Eliphalet Remington was an American inventor and industrialist, best known for revolutionizing the firearms industry through his innovative designs and manufacturing techniques.
James B. Eads was an American engineer and inventor who revolutionized bridge and ship design, constructing the first steel bridge and pioneering deep-water diving techniques.