Protective case

FIG. 1 is a front elevation view of a protective case showing the new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof.

The dot-dash lines in the figures depict interior boundaries of the protective case that form no part of the claimed design.