Keyboard Cover

FIG. 1 is a front perspective view of a first embodiment of a keyboard cover, showing our new design; FIG. 2 is a front view thereof; FIG. 3 is a back view thereof; FIG. 4 is a top view thereof; FIG. 5 is a bottom view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a left side view thereof; FIG. 8 is a front perspective view thereof, shown in an environmental use; FIG. 9 is a front perspective view of a second embodiment of a keyboard cover, showing our new design; FIG. 10 is a front view thereof; FIG. 11 is a back view thereof; FIG. 12 is a top view thereof; FIG. 13 is a bottom view thereof; FIG. 14 is a right side view thereof; FIG. 15 is a left side view thereof; FIG. 16 is a front perspective view thereof, shown in an environmental use; FIG. 17 is a front perspective view of a third embodiment of a keyboard cover, showing our new design; FIG. 18 is a front view thereof; FIG. 19 is a back view thereof; FIG. 20 is a top view thereof; FIG. 21 is a bottom view thereof; FIG. 22 is a right side view thereof; FIG. 23 is a left side view thereof; and, FIG. 24 is a front perspective view thereof, shown in an environmental use. The broken lines in the drawings illustrate unclaimed portions of the claimed design as well as the environment of the design, and form no part thereof.