De Kerniea James Thomas Hiett
History of Computers and Computing, Calculating tools, Gadgets, De Kerniea James Thomas Hiett In 1897, De Kerniea James Thomas Hiett obtained a patent for a multi column keyboard adding and printing calculator.His machine was first called the Heitt Adding and Listing Machine, and then Universal Adding Machine from 1900 onward, and went into production, with an electric motor added in 1903.This adding machine looks similar to an old fashioned typewriter. Oddly, there are duplicate numbers in rows up to 9: a row with nine 0’s, a row with nine 1’s, a row with nine 2’s, and so on....