Computer track ball

Description

FIG. 1 is a perspective view of a computer track ball showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a right side elevational view thereof, the left side being a mirror image.

Referenced Cited
U.S. Patent Documents
D288930 March 24, 1987 Barbera et al.
D291318 August 11, 1987 Kim
D302010 July 4, 1989 McLaughlin et al.
D303662 September 26, 1989 Hsiao et al.
D315552 March 19, 1991 Sacherman
4831736 May 23, 1989 Bryant, Sr.
5006836 April 9, 1991 Cooper
Patent History
Patent number: D332093
Type: Grant
Filed: Feb 21, 1991
Date of Patent: Dec 29, 1992
Inventor: Tso S. Yang (Taipei)
Primary Examiner: Susan J. Lucas
Assistant Examiner: M. H. Tung
Law Firm: Rogers, Howell & Haferkamp
Application Number: 7/658,522
Classifications
Current U.S. Class: D14/114