Drill sharpener

Description

FIG. 1 is a right side elevational view of a drill sharpener showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a front elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view; and

FIG. 7 is a top, front and right side perspective view thereof.

Referenced Cited
U.S. Patent Documents
D311027 October 2, 1990 Yuen
3911629 October 1975 Steinmetz
4485596 December 4, 1984 Bernard et al.
4703588 November 3, 1987 Hosoi
4742648 May 10, 1988 Ketteringham
4916867 April 17, 1990 Lockwood
Patent History
Patent number: D324224
Type: Grant
Filed: Aug 17, 1989
Date of Patent: Feb 25, 1992
Inventor: Mu-Yen Chien (Taichung, Taiwan)
Primary Examiner: Bruce W. Dunkins
Assistant Examiner: Antoine D. Davis
Law Firm: Bacon & Thomas
Application Number: 7/394,855