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"?
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".
i don't know