The ornamental design for a protectivecase for tabletpc, as shown and described.
FIG. 1 is a perspective view of a protective case for tablet PC, showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a perspective view in an alternative configuration thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a top plan view thereof; and,
FIG. 9 is a bottom plan view thereof.
The broken lines in the drawings are for the purpose of illustrating portions of the protective case for tablet PC that form no part of the claimed design.