The ornamental design for a vent guard for a vehicle window, as shown and described.
FIG. 1 is a side elevation view of a vent guard for a vehicle window
showing my new design, the opposite side being a mirror image thereof;
FIG. 2 is a greatly enlarged rear elevational view thereof broken away in
the middle for convenience of illustration; and,
FIG. 3 is a perspective view thereof on a greatly reduced scale in position
of use on a vehicle which is shown in broken lines for illustrative
purposes only and forms no part of the claimed design.
The top, bottom and front edges of the vent guard are understood to be
plain and unornamented and of a uniform thickness such as the rear edge
thereof shown in FIG. 2 of the drawing.