"Charles Xavier Thomas de Colmar (May 5, 1785 – March 12, 1870) was a French inventor and entrepreneur best known for designing, patenting and manufacturing the first commercially successful mechanical calculator, the Arithmometer, and for founding the insurance companies Le Soleil and L´aigle which, under his leadership, became the number one insurance group in France at the beginning of the Second Empire." - (en.wikipedia.org 31.01.2020)
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