We claim the ornamental design for an ultrasound diagnostic apparatus, as shown and described.
FIG. 1 is the front perspective view of an ultrasound diagnostic apparatus showing our new design;
FIG. 2 is the front view thereof;
FIG. 3 is the rear view thereof;
FIG. 4 is the left-side view thereof;
FIG. 5 is the right-side view thereof;
FIG. 6 is the top view thereof; and,
FIG. 7 is the bottom view thereof.
The broken lines immediately adjacent the shaded areas represent the bounds of the claim, while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.