Oral sleep appliance

FIG. 1 is a perspective view of an oral sleep appliance showing our new design;

FIG. 2 is a front view of oral sleep appliance thereof;

FIG. 3 is a rear view of oral sleep appliance thereof;

FIG. 4 is a top view of oral sleep appliance thereof;

FIG. 5 is a bottom view of oral sleep appliance thereof;

FIG. 6 is a right side view of oral sleep appliance thereof; and,

FIG. 7 is a left side view of oral sleep appliance thereof.

The oblique lines in the figures show transparent or translucent shading on surfaces of the oral sleep appliance. The dashed broken lines in the figures show portions of the oral sleep appliance that form no part of the claimed design.