Typewriting machines – Key-board or key lever-actuating mechanism – Key-board arranged according to character location
Patent
1998-02-09
1999-09-21
Burr, Edgar
Typewriting machines
Key-board or key lever-actuating mechanism
Key-board arranged according to character location
400484, B41J 510
Patent
active
059544376
ABSTRACT:
A computer keyboard consists of keys which are arranged in groups according to five different patterns for enhancing the key-in efficiency. The first and the second patterns are respectively composed of four sets of specific keys which are arranged in group and covered with four different colors. The third and fourth patterns consist respectively of five sets of specific keys which are grouped and covered with five different colors. The fifth pattern consists of seven sets of specific keys which are grouped and covered with seven different colors.
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patent: 5660488 (1997-08-01), Miller
Keyboard, LC Smith adn Corona Typewriters Inc., 1935.
Burr Edgar
Grohusky Leslie
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