Respiratory Mask Filter

FIG. 1 is a front perspective view of a first embodiment of a respiratory mask filter in accordance with the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and

FIG. 7 is a bottom view thereof.

FIG. 8 is a front perspective view of a second embodiment of a respiratory mask filter in accordance with the new design;

FIG. 9 is a front view thereof;

FIG. 10 is a left side view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a right side view thereof;

FIG. 13 is a top view thereof; and,

FIG. 14 is a bottom view thereof.

The dotted lines in FIGS. 1 - 6 represent a boundary of the claimed design. The appearance of any portion of the article within the dotted lines in FIGS. 1 - 6 forms no part of the claimed design.