The ornamental design for a “magnetic display board,” as shown and described.
FIG. 1 is an isometric view of a magnetic display board according to the present invention, wherein the small circles represent magnets;
FIG. 2 is a front view of the magnetic display board according to the present invention;
FIG. 3 is a rear view of the magnetic display board according to the present invention, wherein the smaller circles represent magnets;
FIG. 4 is an enlarged top view of the magnetic display board according to the present invention;
FIG. 5 is an enlarged bottom view of the magnetic display board according to of the present invention;
FIG. 6 is an enlarged side view of the magnetic display board according to the present invention, wherein the opposite side is identical thereto; and,
FIG. 7 is an isometric view of the magnetic display shown in FIG. 1, with the transparent sheet partially removed.
The present invention is a magnetic display board mainly adapted for displaying an ad, announcement, a flyer, or such between a board and a transparent sheet. The board and the transparent sheet are provided with corresponding magnets. The broken lines represent openings in the display board, and form no part of the claimed design.