The ornamental design for an ironing boardattachment for supporting garment hangers, as shown and described.
FIG. 1 is a top plan view of an ironing board attachment for supporting
garment hangers showing my new design the bottom plan view being a mirror
image of the top;
FIG. 2 is an elevational view thereof; and,
FIG. 3 is a sectional view thereof taken on line 3--3 of FIG. 2 with a
portion of an ironing board and a garment hanger shown in dashed lines for
illustrative purposes.