Knife sharpener

Description

The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee.

1. Knife sharpener

1.1 : Perspective

1.2 : Front

1.3 : Back

1.4 : Left

1.5 : Right

1.6 : Top

1.7 : Bottom

The characteristic features of the design lie in the shape as shown.

Claims

The ornamental design for a knife sharpener as shown and described.