What did John T. Thompson invent and lend his name to, a notorious feature of the Prohibition era that earned nicknames including the "Chicago Typewriter" and "Trench Sweeper"?
John T. Thompson: John Taliaferro (pronounced "tolliver") Thompson (December 31, 1860 – June 21, 1940) was a United States Army officer best remembered as the inventor of the Thompson submachine gun. Thompson submachine gun: The Thompson submachine gun is an American submachine gun, invented by John T. Thompson in 1918, that became infamous during the Prohibition era. Thompson submachine gun:  The Thompson submachine gun was also known informally as the "Tommy Gun", "Annihilator", "Chicago Typewriter", "Chicago Piano", "Chicago Style", "Chicago Organ Grinder", "Trench Broom", "Trench Sweeper", "The Chopper", and simply "The Thompson".
Thompson submachine gun