Track ball

- Logitech, Inc.
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Description

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

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

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

FIG. 7 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D272921 March 6, 1984 Kim
D291318 August 11, 1987 Kim
D302426 July 25, 1989 Bradley et al.
D315552 March 19, 1991 Saeherman
D326261 May 19, 1992 Ashmun et al.
4952919 August 28, 1990 Nippoldt
Other references
  • Softwarehouse Catalog item Mouse Systems.RTM. Trackball, p. 29, Winter '89-'90.
Patent History
Patent number: D338883
Type: Grant
Filed: Oct 1, 1991
Date of Patent: Aug 31, 1993
Assignee: Logitech, Inc. (Fremont, CA)
Inventors: Tino Melzer (San Francisco, CA), Daniel Harden (Altnau)
Primary Examiner: Wallace R. Burke
Assistant Examiner: M. H. Tung
Law Firm: Townsend and Townsend Khourie and Crew
Application Number: 7/770,284
Classifications
Current U.S. Class: D14/114