Ventilation Filter

FIG. 1 is a perspective view of a ventilation filter showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a right-side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view of the ventilation filter shown in a state of use.

The broken lines shown in FIG. 8 are for the purpose of illustrating environmental structure and form no part of the claimed design.