The ornamental design for an anesthesiamask, as shown and described.
FIGS. 1-7 illustrate a transparent anesthesia mask, showing my new design.
FIG. 1 is a front view of the anesthesia mask.
FIG. 2 is a back view of the anesthesia mask.
FIG. 3 is a top view of the anesthesia mask.
FIG. 4 is a bottom view of the anesthesia mask.
FIG. 5 is a front perspective view of the anesthesia mask.
FIG. 6 is a back perspective view of the anesthesia mask; and,
FIG. 7 is a left perspective view of the anesthesia mask.
The surface shading is for purposes of illustrating the character and/or contour of the surfaces of the claimed invention and forms no part of the claimed design.