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The ornamental design for a knife sharpener, as shown. |
FIG. 1 is a front, top and left side perspective view of a knife sharpener showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left side elevational view thereof; and
FIG. 7 is a right side elevational view thereof.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Nov 10 1983 | VAN ASTEN, JAN F | U S PHILIPS CORPORATION | ASSIGNMENT OF ASSIGNORS INTEREST | 004208 | /0247 | |
Dec 12 1983 | U.S. Philips Corporation | (assignment on the face of the patent) | / |
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