We claim the ornamental design for a toilet seat apparatus, as shown and described.
FIG. 1 is a first perspective view of a toilet seat apparatus according to one embodiment.
FIG. 2 is a second perspective view of the toilet seat apparatus of FIG. 1.
FIG. 3 is a first side view of the toilet seat apparatus of FIG. 1.
FIG. 4 is a second side view of the toilet seat apparatus of FIG. 1.
FIG. 5 is a front view of the toilet seat apparatus of FIG. 1.
FIG. 6 is a rear view of the toilet seat apparatus of FIG. 1.
FIG. 7 is a top view of the toilet seat apparatus of FIG. 1; and,
FIG. 8 is a bottom view of the toilet seat apparatus of FIG. 1.
Portions of the toilet seat apparatus shown in broken lines are included for the purpose of illustrating environment and form no part of the claimed design.