Air filter

Description

FIG. 1 is a front perspective view of an air filter showing our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The uneven-length broken lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part of the claimed design. The broken lines depicting the remainder of the air filter form no part of the claimed design.

Claims

The ornamental design for an air filter, as shown and described.