FIG. 1 is a front perspective view of the ornamental design for electric sharpener of the invention;
FIG. 2 is a front elevational end view of the ornamental design for electric sharpener of FIG. 1;
FIG. 3 is a front elevational right end view, viewing FIG. 1, of the ornamental design for electric sharpener of FIG. 1;
FIG. 4 is a front elevational left end view, viewing FIG. 1, of the ornamental design for electric sharpener of FIG. 1;
FIG. 5 is a rear elevational view of the ornamental design for two electric sharpener of FIG. 1;
FIG. 6 is a top plan view of the ornamental design for electric sharpener of FIG. 1; and,
FIG. 7 is a bottom plan view of the ornamental design for electric sharpener of FIG. 1.