We claim the ornamental design for an electronic device case, as shown and described.
FIG. 1 is a front perspective view of an electronic device case;
FIG. 2 is a back bottom perspective view of the electronic device case;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left elevational view thereof;
FIG. 6 is a right elevational view thereof;
FIG. 7 is a back elevational view thereof; and,
FIG. 8 is a front elevational view thereof.
The broken lines shown on or along the perimeter of the electronic device cover represent stitching and are part of the claim. The short, randomly placed undulating lines depicted in the figures are for illustrating a texture of the electronic device cover and form part of the claim. The broken lines located in the center of the aperture are for illustrative purposes only and form no part of the claim.