Membrane keyboard and method of using same
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United States of America Patent
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-
May 18, 1993
Grant Date -
N/A
app pub date -
Feb 21, 1991
filing date -
Feb 21, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A membrane keyboard producing audible and tactile responses when individual character keys are depressed. To facilitate typing efficiency, the keyboard has membrane characters keys with different transverse heights and adjustable sensory responses.
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Cited Art Landscape
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