Who invented the pencil sharpener?

The French are the second generation parents of pencils (yes, without them, perhaps the whole world is using writing brushes): 1795, Nicolas-Jacques Conte invented the manufacturing technology of clay-graphite mixed materials. 1828, Bernard Lassimone invented the pencil sharpener (or pencil sharpener). 1847, Therry des Estwaux invented mechanical pencil. There are many things about pencils, /2008/03/0 1/20 _ Unknown _ Facts in pencil.html.