Trackball device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 7, 1992
Grant Date -
N/A
app pub date -
Apr 25, 1990
filing date -
May 26, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A trackball device comprising a housing having a circular opening formed in a top wall thereof, a ball received in the housing and partially projecting through the circular opening, a pair of rotatable members arranged orthogonally to each other and rotatable in accordance with rotation of the ball, detectors capable of detecting the amounts of rotation of the respective rotatable members, and elastic members arranged in the vicinity of the edge of the circular opening and capable of suppressing vibration of the ball.
First Claim
Family
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Cited Art Landscape
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