By Karl Ludvigsen
From 1924 Claveau began thinking through the design of an auto from first principles, guided as he was by the Discours of Descartes. On 5 September 1925 he lodged a patent on a suspension system that he pictured as applying to two vehicles, both open models and both teardrop-shaped in plan view. At that time French makers Cottin & Desgouttes and Sizaire-Naudin were leaders in deploying transverse leaf springs as a means of giving independent suspension.