Variable color display typewriter

Details Variable color display typewriter Variable color display typewriter

1988-02-01

1989-04-25

Wright, Jr., Ernest T.

Typewriting machines

Means auxiliary to typewriting function

Indicator means

400 83, 340709, 340715, 3408151, B41J 2900

Patent

active

048242691

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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patent: 4647217 (1987-03-01), Havel
patent: 4726059 (1988-02-01), Havel
Hewlett Packard Application Note 1001, "Interfacing the HDSP-2000 to Microprocessor Systems", pp. 398-413, 1980.
1984 National Semiconductor Corporation CMOS Databook, pp. 1-319.

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