The ornamental design for a lapdesk bolster, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a top, left front, perspective view of a new design for a lap desk bolster;
FIG. 2 is an bottom, right front, perspective view of the new design of FIG. 1;
FIG. 3 is a top plan view of the new design of FIG. 1;
FIG. 4 is a bottom plan view of the new design of FIG. 1;
FIG. 5 is a rear elevational view of the new design of FIG. 1;
FIG. 6 is a front elevational view of the new design of FIG. 1;
FIG. 7 is a right side elevational view of the new design of FIG. 1; and,
FIG. 8 is a left side elevational view of the new design of FIG. 1.
Long-dashed broken lines included within the figures represent environmental structure only and do not form part of the claimed design.