This Day in History: October 29

Today: December 9, 2016
Willgodt T. Odhner Was Granted a Patent for a Calculating Machine That Performed Multiplications by Repeated Additions

October 29, 1878

Willgodt T. Odhner Was Granted a Patent for a Calculating Machine That Performed Multiplications by Repeated Additions

The patent, a modified and compact version of Gottfried von Leibniz's stepped wheel, was acquired and embodied in Brunsviga calculators that sold into the 1950s.