Folding Knife

FIG. 1 is a front, top perspective view of a folding knife, showing my new design; FIG. 2 is a rear, bottom perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a rear elevation view thereof; FIG. 5 is an enlarged left side elevation view thereof; FIG. 6 is an enlarged right side elevation view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is a bottom plan view thereof; FIG. 9 is another perspective view of the folding knife, shown in an alternate position; and, FIG. 10 is another perspective view of the folding knife, shown in an alternate position. The broken lines in the figures illustrate portions of the folding knife that form no part of the claimed design.