We claim the ornamental design for a case for a tablet shaped device, as shown and described.
FIG. 1 shows an isometric view of a bottom of a case for a tablet shaped device, the case being in a first configuration.
FIG. 2 shows a bottom view of the case of FIG. 1.
FIG. 3 shows a front view of the case of FIG. 1.
FIG. 4 shows a back view of the case of FIG. 1.
FIG. 5 shows a side view of the case of FIG. 1.
FIG. 6 shows another side view of the case of FIG. 1; and,
FIG. 7 shows another isometric view of the case, the case being in a second configuration.
The figures include broken lines that are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.