The ornamental design for a backpack, 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.
1. Backpack
1.1:Front
1.2 : Front perspective
1.3 : Back perspective
1.4 : Back perspective
The “Saint Maniero” text and symbols forming part of the claimed design are registered trademarks of Alexander Jais.
The black, brown, cream, and silver portions of the backpack form part of the claimed design.