Trackball mechanism
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United States of America Patent
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-
Aug 28, 1990
Grant Date -
N/A
app pub date -
Apr 6, 1989
filing date -
Apr 6, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A trackball-type input device (10) uses a retainer (114) to secure a ball (80) to a housing (12) so that a large segment (164) of the ball (80) protrudes from the housing (12) for manipulation by the user, thereby affording precise control over rotational movement of the ball (80).
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