Philippe Gengembre, born at Houdain (Pas-d'Calés) on 22 March 1764, died in Indret in Loire-Inferieure on 19 January 1838, was a French chemist and inventor, Inspector General of Coins (inspécteu général des Monnaies), then director and founder of the Manufacture roéyale des machines à vapeur (Royal Manufacture of Steam Engines) at Indret, near Nantes.
See Wikipedia entry.