Willgodt T. Odhner granted a patent for a calculating machine
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29th October 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 1950s. The patent was no. 209416 in the USA: http://www.oocities.org/andriesdeman/patodh1.html
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