Case for an Electronic Device

FIG. 1 is a bottom front perspective view of a case for an electronic device showing the claimed design; FIG. 2 is a top front perspective view thereof; FIG. 3 is a bottom rear perspective view thereof; FIG. 4 is a top rear perspective view thereof; FIG. 5 is a front view thereof; FIG. 6 is a rear view thereof; FIG. 7 is a left side view thereof; FIG. 8 is a right side view thereof; FIG. 9 is a top view thereof; and, FIG. 10 is a bottom view thereof. The broken lines in the figures show portions of the case for an electronic device that form no part of the claimed design.