I claim the ornamental design for knife serrations, as shown and described.
FIG. 1 is a perspective view of a serrated knife blade as viewed from the bottom and one side thereof, according to one embodiment.
FIG. 2 is a side elevation view of the serrated side of the knife blade shown in FIG. 1.
FIG. 3 is a bottom view of the knife blade of FIG. 1.
FIG. 4 is a side elevation view of the non-serrated side of the knife blade shown in FIG. 1.
FIG. 5 is a top view of the knife blade of FIG. 1.
FIG. 6 is a perspective view of a knife serration as viewed from the bottom and one side thereof.
FIG. 7 is a side elevation view of the knife serration shown in FIG. 6.
FIG. 8 is a bottom view of the knife serration shown in FIG. 6; and,
FIG. 9 is a side elevation view of the knife serration showing the opposite side from that shown in FIG. 7.
The dashed lines in the drawings showing particulars of the knife and the location of the serrations along the bottom, cutting edge of the knife are for illustrative purposes only and form no part of the claimed design.