Typewriting machines – Key-board or key lever-actuating mechanism – Key-board including keys grouped to facilitate positioning...
Reexamination Certificate
2005-08-23
2005-08-23
Hirshfeld, Andrew H. (Department: 2854)
Typewriting machines
Key-board or key lever-actuating mechanism
Key-board including keys grouped to facilitate positioning...
C400S484000, C400S485000, C400S486000, C400S487000
Reexamination Certificate
active
06932525
ABSTRACT:
A keyboard arrangement that assigns alphanumeric and special character symbols to keys based upon the shapes of the symbols in order to facilitate learning to type. Attribute classes are defined according to the number, position, direction, or contours of the line segments that comprise the symbols. As an aid to memorization of a keyboard arrangement, symbols are assigned to keys such that a substantial number of keys in a column of keys belong to the same attribute class. To convert any prior art or other kind of electronic keyboard to a keyboard arrangement within the scope of the invention, hardware and/or software components are provided that reassign the keys so that substantially all keys within the same column will correspond to symbols within the same attribute class.
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Coyne Brian J.
Hamdan Wasseem H.
Hirshfeld Andrew H.
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