Knife sharpener

USD1054823SActive Publication Date: 2024-12-24CHEN YITING

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[0001] FIG. 1 is a perspective view of a knife sharpener design showing my new design.

[0002] FIG. 2 is a front view of a knife sharpener.

[0003] FIG. 3 is a rear view of a knife sharpener.

[0004] FIG. 4 is a left side view of a knife sharpener.

[0005] FIG. 5 is a right side view of a knife sharpener.

[0006] FIG. 6 is a top view of a knife sharpener.

[0007] FIG. 7 is a bottom view of a knife sharpener; and,

[0008] FIG. 8 is a front, bottom side perspective view of a knife sharpener.

[0009] The broken lines depict portions of the knife sharpener in which the design is embodied that form no part of the claimed design.

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