The ornamental design for a coordinate inputdevice, as shown and described.
FIG. 1 is a top rear perspective view of a coordinate input device showing my new design;
FIG. 2 is a rear view of the coordinate input device of FIG. 1;
FIG. 3 is a top view of the coordinate input device of FIG. 1;
FIG. 4 is a bottom view of the coordinate input device of FIG. 1;
FIG. 5 is a left side view of the coordinate input device of FIG. 1;
FIG. 6 is a right side view of the coordinate input device of FIG. 1;
FIG. 7 is a top rear perspective view of the coordinate input device of FIG. 1, showing legs of the coordinate input device in an extended position; and,
FIG. 8 is a front view of the coordinate input device of FIG. 1.
The broken lines show portions of the coordinate input device which form no part of the claimed design.