US D657863 S1
The ornamental design for a mask, as shown and described.
FIG. 1 is a front perspective view of a mask according to our new ornamental design;
FIG. 2 is a front view thereof; and,
FIG. 3 is a top view thereof.
Where included, broken lines showing environment or structure are for illustrative purposes only and form no part of the claimed design.
|1||Kooij et al., U.S. Appl. No. 29/257,607, filed Apr. 7, 2006.|
|2||Product Brochure, "Spectrum® Reusable Full Face Mask", Respironics (1999), 2 pgs.|
|3||Raje et al., U.S. Appl. No. 29/233,066, filed Jun. 28, 2005.|