The ornamental design for a protectivecover for an electronic device, as shown and described.
FIG. 1 is a perspective view of a protective cover for an electronic device, showing our new design;
FIG. 2 is a perspective view of the protective cover for an electronic device of FIG. 1 shown in another position;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a right-side elevational view thereof;
FIG. 6 is a left-side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a perspective view of the protective cover for an electronic device in use with a subscriber identity module (SIM) card and a card fetching needle for reference.
The broken lines in the drawings are employed to show unclaimed portions of the protective cover for an electronic device, and form no part of the claimed design.