Typewriting machines – Means auxiliary to typewriting function – Indicator means
Patent
1989-04-11
1990-06-19
Wright, Jr., Ernest T.
Typewriting machines
Means auxiliary to typewriting function
Indicator means
400 83, 400711, 340709, 340715, 3408151, B41J 2900
Patent
active
049348523
ABSTRACT:
A typewriter with variable color display visually presents typed text in a color variable in accordance with the typing speed and accuracy.
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