Knife sharpener

The ornamental design for a knife sharpener, as shown.

FIG. 1 is a top plan view of a knife sharpener showing my new design;

FIG. 2 is a front elevational view of the knife sharpener;

FIG. 3 is a right side elevational view of the knife sharpener;

FIG. 4 is a bottom plan view of the knife sharpener;

FIG. 5 is a rear elevational view of the knife sharpener; and,

FIG. 6 is a top, front and right side perspective view of the knife sharpener.

Patent	Priority	Assignee	Title
D372181,	Jul 01 1994	Cutco Cutlery Corporation	Knife sharpener
D410185,	Aug 15 1994	HUBER FAMILY TRUST U A RESTATED MAY 2, 1988, THE	Knife sharpener
D487691,	Apr 21 2003		Knife sharpener
D778705,	Apr 11 2014		Blade sharpener
D799930,	Apr 11 2016	SMITH S CONSUMER PRODUCTS, INC	Hook and knife sharpener

Patent	Priority	Assignee	Title
1919772,
2432231,
2448629,
2885836,
4550632,	Jan 18 1983	Archant Limited	Knife sharpener
4672777,	Mar 06 1986		Knife sharpening device
918689,
183530,
184423,
D274497,	Feb 22 1982	EKCO HOUSEWARES, INC , A DE CORP	Knife sharpener
D276886,	Dec 29 1982	Oy Fiskars AB	Knife sharpener
D280695,	Oct 17 1983	SAVANT ENGINEERING, INC , A COLORADO CORP	Knife sharpener
D315663,	Jun 10 1988	CREATIVE PRODUCTS INTERNATIONAL, INC , A CORP OF TX	Hand held knife sharpener

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