I claim the ornamental design for the skateboard grip cover, as shown and described.
FIG. 1—Is a front view of the skateboard grip cover, with a sectional view call-out for FIG. 7;
FIG. 2—Is a back view of the skateboard grip cover;
FIG. 3—Is a top view of the skateboard grip cover;
FIG. 4—Is a bottom view of the skateboard grip cover;
FIG. 5—Is a left view of the skateboard grip cover, with an enlargement detail call-out for FIG. 8;
FIG. 6—Is a right view of the skateboard grip cover;
FIG. 7—Is a sectional view of the skateboard grip cover taken from line 7-7 from FIG. 1;
FIG. 8—Is an enlarged partial view showing the detail of the skateboard grip cover from the top of FIG. 5;
FIG. 9—Is an enlarged partial view showing the detail of the skateboard grip cover from the top of FIG. 7; and,
FIG. 10—Is an environmental perspective view of skateboard, showing how the skateboard grip cover conforms to a 3-D surface.
Any broken line illustration of environmental structure in the drawing is not part of the design sought to be patented. The skateboard is shown in broken lines for illustrative purposes only and forms no part of the claimed design. The broken lines in FIGS. 8 & 9 represent the boundaries of the enlarged partial views and form no part of the claimed design.