Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Reexamination Certificate
2008-01-16
2011-11-08
Friedhofer, Michael (Department: 2833)
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
C400S472000, C400S490000, C341S022000, C345S168000
Reexamination Certificate
active
08053688
ABSTRACT:
Disclosed herein is a method of masking audible sounds emanating from a keyboard in response to a stroking of keys on the keyboard, the method comprising, selecting components from a plurality of components with various masses, building the keyboard with the selected components, moving a movable mass within the keyboard, and energizing a driving transducer within the keyboard. Further disclosed herein is a keyboard for a computer, comprising a plurality of keys, a cover with the keys protruding therethrough, a base supporting the cover and the keys, and at least one selectable mass wherein the mass is selected from a plurality of masses, a movable mass supported by the base and movable relative to the base, and a driving transducer supported by the base.
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Conzola Vincent C.
Lanzolla Vincent R.
Meserth Timothy A.
Muenkel Gerard F.
Windell David T.
Bluestone Randall
Cantor & Colburn LLP
Friedhofer Michael
International Business Machines - Corporation
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