Track ball

- Logitech, Inc.
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Description

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

FIG. 2 is a top plan view thereof;

FIG. 3 is front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan 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
4862165 August 29, 1989 Gast
4952919 August 28, 1990 Nippoldt
Other references
  • Businessland catalog item Kensington Turbo Mouse, p. 22, 1988.
Patent History
Patent number: D331398
Type: Grant
Filed: Oct 30, 1991
Date of Patent: Dec 1, 1992
Assignee: Logitech, Inc. (Fremont, CA)
Inventors: Richard Clouss (San Jose, CA), Daniel Harden (Palo Alto, CA), Tino Melzer (Kreuzlingen)
Primary Examiner: Wallace R. Burke
Assistant Examiner: M. H. Tung
Law Firm: Townsend and Townsend
Application Number: 7/786,877
Classifications
Current U.S. Class: D14/114