Samuel Colt influence in other manufacturing efforts of the next half century. Prominent examples included Francis A. Pratt, Amos Whitney, Henry Leland, Edward Bullard, Worcester R. Warner, Charles Brinckerhoff Richards, William Mason and Ambrose Swasey. In 2006, Samuel Colt was inducted into the National Inventors Hall of Fame. Samuel Colt Samuel Colt (; July 19, 1814 – January 10, 1862) was an American inventor, industrialist, businessman, and hunter. He founded Colt's Patent Fire-Arms Manufacturing Company (today Colt's Manufacturing Company) and made the mass production of the revolver commercially viable. Colt's first two business ventures were producing firearms in Paterson, New Jersey and
.320 Revolver .320 Revolver Also known as the .320 European or .320 Bulldog, this revolver cartridge was designed for the Webley Bull Dog pocket revolver in the 1870s and similar revolvers made in Belgium that followed. The round was manufactured until the 1920s and was briefly made by Fiocchi in 2015. In Brazil, both guns and ammo (double-barreled, side by side pistols) was made up to 1960s. Amadeo Rossi made his Model 8 "Garrucha" in .320 from 1950 to 1962. The .32 Short Colt was based on the .320 but had a different sized rim. On some guns the .32 Short Colt