Essington N. Gilfillan is listed as an assignor on this 1910 patent of a pencil sharpening blade. | Pencil sharpener, Automatic pencil, Pencil sharpeners
office, office equipment, pencil sharpener, typ Avanti, Deutsches Reichspatent (German Reich Patent), Germany, circa 1910, Additional-Rights-Clearences-Not Available Stock Photo - Alamy
Image of Prototype pencil sharpener, 1933 (metal) (see also 570546) by Loewy, Raymond (1893-1986)
Image of A prototype metal pencil sharpener, 1933 (metal) by Loewy, Raymond (1893-1986)
Amusingly Elaborate Early Designs for Pencil Sharpeners - Core77