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André Citroën (5 February 1878 - 3 July 1935) is the name of the engineer who founded a car factory in France at the beginning of the twentieth century. In 1900 he acquired a Russian patent in Poland for a production method that enabled him to produce gears with V-shaped teeth. Advantage of this is the greater strength,
greater precision (the teeth do not 'shift'), and therefore lower wear and a lower noise level. This special shape can be found later as the double twill in the Citroën logo.


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