Track ball

Description

FIG. 1 is a front, top, right side perspective view of a track ball showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is an inverted rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D272921 March 6, 1984 Kim
D289306 April 14, 1987 Burnstein et al.
D326261 May 19, 1992 Ashmun et al.
4538476 September 3, 1985 Lugue
4952919 August 28, 1990 Nippoldt
Other references
  • Businessland Catalog item Kensington Turbo Mouse, p. 22, 1988.
Patent History
Patent number: D333818
Type: Grant
Filed: Aug 2, 1991
Date of Patent: Mar 9, 1993
Inventor: Tso S. Yang (Taipei)
Primary Examiner: Wallace R. Burke
Assistant Examiner: M. H. Tung
Law Firm: Bacon & Thomas
Application Number: 7/740,015
Classifications
Current U.S. Class: D14/114