Charles Xavier Thomas | |
|---|---|
 Drawing of Charles Xavier Thomas | |
| Born | May 5, 1785 Colmar, France |
| Died | March 12, 1870 (aged 84) Paris, France |
| Nationality | French |
| Known for | Arithmometer |
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, known as the Arithmometer. Additionally, he founded the insurance companies Le Soleil and L'aigle, which, under his leadership, became the number one insurance group in France during the early years of the Second Empire.