We claim the ornamental design for a packaging box, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is an isometric view of my design for a packaging box;
FIG. 2 is a front view of the design for a packaging box shown in FIG. 1, the rear view being identical;
FIG. 3 is a top view of the design for a packaging box shown in FIG. 1;
FIG. 4 is a bottom view of the design for a packaging box shown in FIG. 1;
FIG. 5 is a left side view of the design for a packaging box shown in FIG. 1; and,
FIG. 6 is a right side view of the design for a packaging box shown in FIG. 1.