Typewriting machines – Key-board or key lever-actuating mechanism – Key-board including row of keys having different heights
Reexamination Certificate
2005-03-01
2005-03-01
Colilla, Daniel J. (Department: 2854)
Typewriting machines
Key-board or key lever-actuating mechanism
Key-board including row of keys having different heights
C400S489000
Reexamination Certificate
active
06860661
ABSTRACT:
An ergonomic keyboard providing support for the palms and fingers of a user. The ergonomic keyboard comprises a plurality of surfaces of different elevations, the surface of highest elevation adapted to support the palms so that the thumbs are separated from the rest of the fingers that are positioned on a distal side of the ergonomic keyboard. At least one surface of the plurality of surfaces is located on the distal side and at least one surface of the plurality of surfaces is located on the side where the thumbs are positioned, at least one of the plurality of surfaces is provided with at least one key.
REFERENCES:
patent: 3428747 (1969-02-01), Alferieff
patent: 5178477 (1993-01-01), Gambaro
patent: 5270709 (1993-12-01), Niklsbacher
patent: 5788386 (1998-08-01), Hayashi et al.
patent: 5892499 (1999-04-01), Vulk, Jr.
patent: 2777222 (1999-10-01), None
patent: 2131746 (1984-06-01), None
Colilla Daniel J.
Dippert William H.
Reed Smith LLP
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