Knife sharpener

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

FIG. 1 is a perspective view as seen from the upper left front of a knife sharpener showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a left side view thereof, the right side being a mirror image of the left side; and,

FIG. 4 is a front view thereof.

Patent	Priority	Assignee	Title
D642871,	Nov 02 2008		Kitchen knife blade with safety point
D673439,	Apr 18 2011	Jiin Haur Industrial Co. Ltd.	Knife sharpener
D758821,	Jan 24 2013	Bisbell Magnetic Products Limited	Knife sharpener
D779893,	May 19 2014	Robert Welch Designs Ltd	Knife insert for drawer
D842673,	Aug 01 2016	YUZE LTDA	Sharpener
D907914,	Dec 04 2018	ETS Jean Deglon	Sharpener keychain

Patent	Priority	Assignee	Title
5449315,	Mar 12 1984	EDGECRAFT CORPORATION P O BOX 3000, LIMESTONE & SOUTHWOOD ROADS	Portable manual sharpener for knives and the like
D331688,	Apr 19 1990	ZWILLING J A HENCKELS AKTIENGESELLSCHAFT	Knife sharpener or the like
D332210,	Oct 13 1989	Fiskars Oy AB	Sharpener for scissors
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
D470382,	Oct 08 2001	ZWILLING J A HENCKELS AG	Knife sharpener
D481285,	Oct 04 2002	Dart Industries Inc	Knife sharpener with case
D491786,	Jan 10 2003	WKI HOLDING COMPANY, INC	Sharpener
D519815,	Apr 29 2004	Edgecraft Corporation	Manual sharpener
D587550,	Mar 14 2008	SMITH S CONSUMER PRODUCTS, INC	Two step knife sharpener

Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Jul 23 2008		Robert Welch Designs Limited	(assignment on the face of the patent)
Jul 28 2008	DEBRETTON GORDON, IAIN PAUL	Robert Welch Designs Limited	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	021312	0133	pdf

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