Photo Frame

FIG. 1 is a front, right, top perspective view of a photo frame, showing my new design; FIG. 2 is a rear, left, bottom perspective view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a top view thereof; and, FIG. 8 is a bottom view thereof. The dash-dash broken lines in the drawings illustrate the portions of the photo frame, which form no part of the claimed design. The photo frame is shown with symbolic breaks in its length and width, illustrated by dot-dashed broken lines. The appearance of any portion of the article between the break lines forms no art of the claimed design.