Computer trackball
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 15, 1997
Grant Date -
N/A
app pub date -
Nov 8, 1995
filing date -
Nov 8, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A computer trackball comprises a transparent outer sphere inside of which is disposed a second inner sphere. The outer diameter of the inner sphere is a little bit smaller than the inner diameter of the outer sphere. Disposed on the outer surface of the inner sphere, at one 'end' thereof is a logo or other graphical image. The inner sphere tends to maintain itself in a predetermined orientation--e.g., with the graphical image pointing directly 'up' relative to the keyboard or other housing fin which the trackball is held--notwithstanding rotation of the outer sphere by a user in the course of operating the trackball.
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