Knife sharpener

The ornamental design for a knife sharpener, as shown.

FIG. 1 is a front, side, top perspective view of the knife sharpener, showing a new ornamental design thereof;

FIG. 2 is a back, side, top perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view thereof; and,

FIG. 5 is a front elevational view thereof.

Patent	Priority	Assignee	Title
D525509,	Feb 09 2005	Weschenfelder GmbH	Blade sharpener
D526876,	Mar 14 2005	SMITH S CONSUMER PRODUCTS, INC	Knife and scissors sharpener
D582238,	Nov 16 2007	Ames True Temper, Inc.	Ax sharpener
D587088,	Mar 14 2008	SMITH S CONSUMER PRODUCTS, INC	Abrasive sharpener
D604135,	Feb 13 2009	SMITH S CONSUMER PRODUCTS, INC	Knife and scissors sharpener
D640116,	Jun 28 2010	SMITH S CONSUMER PRODUCTS, INC	Abrasive sharpener
D666886,	Dec 02 2011	High Tech Ceramic eK	Knife sharpener
D680847,	Jan 17 2012	SMITH S CONSUMER PRODUCTS, INC	Adjustable manual abrasive sharpener
D730137,	May 29 2014	Darex, LLC	Powered sharpener base unit
D736587,	Sep 20 2013		Sharpener
D763650,	Dec 15 2014	Zwilling J.A. Henckels AG	Sharpener
D773913,	Dec 15 2014	Zwilling J.A. Henckels AG	Sharpener
D817738,	Jun 14 2016		Manual knife sharpener
D867095,	Nov 16 2017		Sharpener
D884450,	Mar 13 2019	Mr. Bar-B-Q Products LLC	Knife sharpener
ER3597,

Patent	Priority	Assignee	Title
169539,
D315663,	Jun 10 1988	CREATIVE PRODUCTS INTERNATIONAL, INC , A CORP OF TX	Hand held knife sharpener
D323450,	Sep 16 1988		Knive sharpener
D331688,	Apr 19 1990	ZWILLING J A HENCKELS AKTIENGESELLSCHAFT	Knife sharpener or the like
D357395,	Apr 30 1993	Edgecraft Corp.; Edgecraft Corporation	Knife sharpener
D368217,	Apr 30 1993	Edgecraft Corporation	Knife sharpener
D372181,	Jul 01 1994	Cutco Cutlery Corporation	Knife sharpener
D392869,	Jul 26 1996		Knife sharpener
D402523,	Nov 14 1997	ZWILLING J A HENCKELS AG	Knife sharpener

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