Computer keyboard system enabling users to locate keys of letter

Typewriting machines – Key-board or key lever-actuating mechanism – Key-board arranged according to character location

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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.

REFERENCES:
patent: 662834 (1900-11-01), Tcherkassov
patent: 1319687 (1919-10-01), Bates
patent: 3927752 (1975-12-01), Jones et al.
patent: 4602878 (1986-07-01), Merner et al.
patent: 4715736 (1987-12-01), McGunnigle
patent: 5212638 (1993-05-01), Bernath
patent: 5236268 (1993-08-01), Chang
patent: 5452960 (1995-09-01), Kuhlenschmidt
patent: 5660488 (1997-08-01), Miller
Keyboard, LC Smith adn Corona Typewriters Inc., 1935.

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