US D448473 S1
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FIG. 1 is a front perspective view of a nasal mask showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a side elevational view thereof, the opposite side being a mirror image thereto;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The portions drawn in broken lines are shown for illustrative purposes only and do not form part of the claimed design.