Track ball

- Sysgration Ltd.
Description

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

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right rear perspective view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D291318 August 11, 1987 Kim
D315552 March 19, 1991 Sacherman
D335658 May 18, 1993 Barry
Patent History
Patent number: D387043
Type: Grant
Filed: Jul 25, 1996
Date of Patent: Dec 2, 1997
Assignee: Sysgration Ltd. (Taipei Hsien)
Inventor: Fu Chin Cheng (Hsin Tien)
Primary Examiner: Kay H. Chin
Law Firm: Bacon & Thomas
Application Number: 0/57,438
Classifications
Current U.S. Class: D14/114
International Classification: 1402;