US D559664 S1
The ornamental design for a shelf bracket, as shown and described.
FIG. 1 is a perspective view of a shelf bracket showing our new design;
FIG. 2 is a first side view thereof;
FIG. 3 is a second side view thereof;
FIG. 4 is front view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a rear view thereof.
The broken lines in the drawings depict environmental subject matter only and form no part of the claimed design.