Knife sharpener

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FIG. 1 is an upper perspective view of a knife sharpener showing my new design.

FIG. 2 is a cross-sectional view thereof taken along line 2-2 of FIG. 3.

FIG. 3 is a top view thereof.

FIG. 4 is a side view thereof.

FIG. 5 is an enlarged cutaway of a side view thereof.

FIG. 6 is a side view thereof with the guide members moved apart.

FIG. 7 is a top view of the knife sharpener of FIG. 6.

FIG. 8 is a side view of the knife sharpener with the guide members moved apart and a second guide member rotated; and,

FIG. 9 is a front view of the knife sharpener of FIG. 8 with a cross-section taken along line 9-9 in FIG. 8.

Any shading and cross-hatching are not features of the design but are utilized to illustrate the surface contours of the knife sharpener in the drawings.


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

Referenced Cited
U.S. Patent Documents
D276886 December 25, 1984 Carter
D280695 September 24, 1985 Krueger
5046385 September 10, 1991 Cozzini et al.
D392869 March 31, 1998 Rieser
6634257 October 21, 2003 Long et al.
D519815 May 2, 2006 Friel et al.
D569703 May 27, 2008 Wu
Patent History
Patent number: D622573
Type: Grant
Filed: Apr 29, 2009
Date of Patent: Aug 31, 2010
Inventors: Brett A. Friesen (Detroit Lakes, MN), Mitchel T. LeBrasseur (Ludlow, MA), Ken Moncrief (Richmond, VA)
Primary Examiner: Philip S Hyder
Assistant Examiner: Roselynne Cody
Attorney: Neustel Law Offices
Application Number: 29/336,197
Current U.S. Class: D8/93