Variable color display typewriter

Typewriting machines – Means auxiliary to typewriting function – Indicator means

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Details

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.

REFERENCES:
patent: 2717688 (1955-09-01), Brooks
patent: 3270438 (1966-09-01), Ephraim
patent: 3448334 (1969-06-01), Frost
patent: 3636515 (1972-01-01), Smith
patent: 3838417 (1974-09-01), Charas
patent: 3924231 (1975-12-01), McClure
patent: 4086514 (1978-04-01), Havel
patent: 4136395 (1979-01-01), Kolpek et al.
patent: 4140997 (1979-02-01), Brady
patent: 4323315 (1982-04-01), Demonte et al.
patent: 4399434 (1983-08-01), Bielat
patent: 4420711 (1983-12-01), Takahashi et al.
patent: 4442424 (1984-04-01), Shirasaki et al.
patent: 4488149 (1984-12-01), Givins, Jr.
patent: 4617562 (1986-10-01), Klotz
patent: 4647217 (1987-03-01), Havel
patent: 4673252 (1987-06-01), Kugo et al.
patent: 4687340 (1987-08-01), Havel
patent: 4702615 (1987-10-01), Havel
patent: 4707141 (1987-11-01), Havel
patent: 4726059 (1988-02-01), Havel
patent: 4734619 (1988-03-01), Havel
patent: 4736198 (1988-04-01), Tokuyama et al.
patent: 4771274 (1988-09-01), Havel
patent: 4785432 (1988-11-01), Havel
patent: 4789855 (1988-12-01), Ozeki
patent: 4794383 (1988-12-01), Havel
patent: 4804890 (1989-02-01), 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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