We claim the ornamental design for a tablet computer case, as shown and described.
FIG. 1 is a front perspective view of a tablet computer case, according to the invention;
FIG. 2 is a front view of the tablet computer case of FIG. 1;
FIG. 3 is a top view of the tablet computer case of FIG. 1;
FIG. 4 is a bottom view of the tablet computer case of FIG. 1;
FIG. 5 is a left side view of the tablet computer case of FIG. 1;
FIG. 6 is a is a right side view of the tablet computer case of FIG. 1;
FIG. 7 is a rear view of the tablet computer case of FIG. 1;
FIG. 8 is an enlarged front perspective detail of FIG. 1 taken at line 8-8;
FIG. 9 is an enlarged front perspective detail of FIG. 1 taken at line 9-9; and,
FIG. 10 is an enlarged detail view of FIG. 1 taken at line 10-10.
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.