US D498618 S1
FIG. 1 is a perspective view of a shelf structure in accordance with the present invention.
FIG. 2 is a right side elevational view thereof.
FIG. 3 is a left side elevational view thereof.
FIG. 4 is a front view thereof.
FIG. 5 is a rear view thereof.
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines are for illustrative purposes only and form no part of the claimed design.