I claim the ornamental design for a knapsack cover, as shown and described.
A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or patent disclosure as it appears in the Patent and Trademark office, patent file or records, but otherwise reserves all copyright rights whatsoever.
FIG. 1 A first side and bottom perspective view of the claimed design according to the presented embodiment.
FIG. 2 A bottom plan view of the claimed design according to the presented embodiment.
FIG. 3 A top plan view of the claimed design according to the presented embodiment.
FIG. 4 A fourth side plan view of the claimed design according to the presented embodiment.
FIG. 5 A first side plan view of the claimed design according to the presented embodiment.
FIG. 6 A second plan view of the claimed design according to the presented embodiment.
FIG. 7 A third side plan view of the claimed design according to the presented embodiment; and,
FIG. 8 A first side and bottom perspective view of the claimed design according to the presented embodiment.
The broken lines showing elements of the knapsack cover are for the purposes of illustrating environment and forms no part of the claimed design.