Jacob Christoph Rad (* 25 March 1799 in Rheinfelden – † 13 October 1871 in Vienna), in Czech Jakub Kryštof Rad, was a Swiss-born Czech entrepreneur who invented the sugar cubes in 1841 as a director of a sugar factory in Dačice in Moravia.[1]
The idea to produce sugar cube came from his wife, who got injured when she was cutting sugar loaf into smaller parts. She asked her husband to do something about it and she got the sugar cubes during the same year.