THE BEST SIDE OF PENCIL SHARPENER FOR BIG PENCILS

7. the initial pencil sharpener was a knife, duh. In 1828, a French mathematician received a patent for just a sharpener that had two steel data files embedded within a piece of wood. It wasn’t much better than the usual knife. But in 1837, two Englishmen began promoting the same “patent pencil pointer” they known as the Styloxynon. Irres