Pointing devices
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Nov 10, 2005
app pub date -
Mar 31, 2005
filing date -
Apr 1, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A ball 1 for use in a pointing device 19, the ball 1 having provided thereon a pattern 2 which is of a different optical reflectance to the remainder 6 of the ball, the pattern comprising a line running from a first point 3 on the ball to a second point 4 on the ball 1 along the general line of a spiral 5, said pattern including a plurality of lateral deviations 7 from the general line of the spiral 5 so that a movement of the ball 1 along the general line of the spiral 5 will still provide a detectable change in reflectance.
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