Folding Knife

FIG. 1 is a front perspective view of a folding knife showing my ornamental design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is an enlarged top view thereof;

FIG. 8 is an enlarged bottom view thereof; and,

FIG. 9 is an enlarged portion view thereof as shown in FIG. 1 .