The ornamental design for the protective case for an electronicdevice, as shown and described.
FIG. 1 is a front perspective view of an embodiment of a protective case showing the new design;
FIG. 2 is a rear perspective view of the protective case as shown in FIG. 1;
FIG. 3 is a front side view of the protective case as shown in FIG. 1;
FIG. 4 is a rear side view of the protective case as shown in FIG. 1;
FIG. 5 is a right side view of the protective case as shown in FIG. 1;
FIG. 6 is a left side view of the protective case as shown in FIG. 1;
FIG. 7 is a top side view of the protective case as shown in FIG. 1;
FIG. 8 is a bottom side view of the protective case as shown in FIG. 1;
FIG. 9 is a front perspective view of the protective case as shown in FIG. 1 showing the protective case attached to a cellular phone, which forms no part of the claimed invention; and,
FIG. 10 is a cross-sectional view taken along line X-X of FIG. 3 of the protective case as shown in FIG. 1.
The broken lines illustrate portions of the article or environmental subject matter and form no part of the claimed design.