The ornamental design for a cardbox, as shown and described.
FIG. 1 is a top frontal perspective view of a card box constructed in accordance with a preferred embodiment of the present invention shown with the lid closed;
FIG. 2 is a top frontal perspective exploded view of the card box of FIG. 1 shown with the lid open;
FIG. 3 is a bottom frontal perspective view of the opened card box of FIG. 2;
FIG. 4 is a front plan view of the closed card box of FIG. 1;
FIG. 5 is a rear plan view of the closed card box of FIG. 1;
FIG. 6 is a right side view of the closed card box of FIG. 1;
FIG. 7 is a top plan view of the closed card box of FIG. 1; and,
FIG. 8 is a bottom plan view of closed card box of FIG. 1.