The ornamental design for a cardholder, as shown and described.
FIG. 1 is a front perspective view of a first embodiment of a card holder in a partially closed position;
FIG. 2 is a back perspective view of the first embodiment of the card holder in the partially closed position;
FIG. 3 is a front view of the first embodiment of the card holder of FIG. 1 shown in an opened position;
FIG. 4 is a back view of the first embodiment of the card holder of FIG. 1 shown in the opened position;
FIG. 5 is a left-side view of the first embodiment of the card holder of FIG. 1 shown in the opened position;
FIG. 6 is a right-side view of the first embodiment of the card holder of FIG. 1 shown in the opened position;
FIG. 7 is a top view of the first embodiment of the card holder of FIG. 1 shown in the opened position;
FIG. 8 is a bottom view of the first embodiment of the card holder of FIG. 1 shown in the opened position;
FIG. 9 is a front perspective view of a second embodiment of a card holder in a partially closed position. The second embodiment has a left-side view, a right-side, view, a top view, and a bottom view that are identical to the corresponding views in the first embodiment;
FIG. 10 is a back perspective view of the second embodiment of the card holder in the partially closed position;
FIG. 11 is a front view of the second embodiment of the card holder of FIG. 10 shown in an opened position; and,
FIG. 12 is a back view of the second embodiment of the card holder of FIG. 10 shown in the opened position.
The dashed broken lines depict portions of the card holder that form no part of the claimed design. The dot-dashed broken lines represent a boundary of the claimed design and forms no part of the claimed design.