The house was built on travel. By 1884 Dupont was supplying Les Grands Magasins du Louvre while keeping a private clientele; his sons Lucien and André relaunched the firm in 1919 as Les Fils de S.T. Dupont, focusing on high-quality cases and accessories made by goldsmiths, lacquer workers, engravers and leather craftsmen. When Lucien sailed to New York in 1929 at Louis Cartier's invitation and learned of the Wall Street crash mid-voyage, he resolved to move even further upmarket.
Dupont's first serially produced lighter arrived in 1941, and the trademark diamond-head pattern still signs its lighters, pens, wallets, watches and fragrances. Gillette took a 48% stake in 1971; in 1987 the company was sold to the Hong Kong group Dickson Concepts, of which it remains a wholly owned subsidiary.