The ornamental design for a topsurface of a shredder, as shown and described.
FIG. 1 is a top plan and fragmentary view of a top surface of a shredder showing our new design with the surface shading representing contrasting surface textures;
FIG. 2 is a front elevation thereof;
FIG. 3 is a left side elevation thereof;
FIG. 4 is a right side elevation thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a rear elevation view thereof.
The broken lines immediately adjacent to the solid line disclosure represent the bounds of the claimed subject matter. The other broken lines shown in the drawings represent environmental structure and form no part of the claim.
The broken lines shown immediately adjacent to the shaded areas represent the bounds of the claimed subject matter. The other broken lines shown in the drawings represent environmental structure and form no part of the claim. The surface shading shown in FIGS. 1 and 7 represent contrasting surface textures or materials.