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The ornamental design for a blade sharpener, as shown and described.
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FIG. 1 is a top perspective view showing my new design;
FIG. 2 is a left side view in elevation thereof;
FIG. 3 is a right side view in elevation thereof;
FIG. 4 is a top view in plan thereof;
FIG. 5 is a bottom view in plan thereof;
FIG. 6 is front view in elevation thereof; and,
FIG. 7 is a rear view in elevation thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jul 21 2005 | Weschenfelder GmbH | (assignment on the face of the patent) | / |
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