Programmable computer with alphanumeric capabilities having few

Details Programmable computer with alphanumeric capabilities having few Programmable computer with alphanumeric capabilities having few

1989-03-29

1990-03-20

Malzahn, David M.

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36470915, G06F 3023

Patent

active

049106970

ABSTRACT:
Provision is made in programmable alphanumeric calculator systems to provide functional controls from the keyboard for setting up various keyboard operational modes so that fewer keys on the keyboard are necessary. Thus, computer control commands are initiated in a control mode for entries of the commands in response for two successive keystrokes. In particular the entry of a full set of twenty six alphabetic characters typically with fewer than twelve keys is achieved by providing a different operating mode than for the entry of numeric digits from the keys with a single keystroke. Accordingly the alphabetic characters are entered with two successive keystrokes from a subset of six or more keys in different embodiments.

REFERENCES:
patent: 3675513 (1972-07-01), Flanagan et al.
patent: 3892958 (1975-07-01), Tung
patent: 3967273 (1976-06-01), Knowlton
patent: 4120040 (1978-10-01), Aihara
patent: 4202038 (1980-05-01), Petersson
patent: 4272826 (1981-06-01), Deutsch
patent: 4279022 (1981-07-01), Abe
patent: 4302816 (1981-11-01), Yamamoto
patent: 4344069 (1982-08-01), Prame

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