Norton Knife Sharpeners are manufactured in the U.S.A. by Norton Abrasives.  Norton Abrasives is a subsidiary of Saint-Gobain Group located in France.  Norton is the world's largest manufacturer and supplier of performance engineered abrasives, including the Norton line of knife sharpeners.

Les Miroirs
18, Avenue d'Alsace
92400 Courbevoie
France
http://www.nortonabrasives.com