Track ball unit

- Asea Aktiebolag

FIG. 1 is a top perspective view from one end of a track ball unit showing my new design.

FIG. 2 is a perspective view looking from the other end of the track ball unit.

There are no ornamental features on the bottom of the track ball unit.

Referenced Cited
U.S. Patent Documents
D281776 December 17, 1985 Griffen
D285203 August 19, 1986 Milroy et al.
Patent History
Patent number: D292600
Type: Grant
Filed: Oct 1, 1984
Date of Patent: Nov 3, 1987
Assignee: Asea Aktiebolag (Vaster.ang.s)
Inventor: Eric Wagner (Vaster.ang.s)
Primary Examiner: Melvin B. Feifer
Law Firm: Pollock, Vande Sande & Priddy
Application Number: 6/656,799
Current U.S. Class: D21/48; D13/32; D14/114