Multi-functional electronic desk calculator

Details Multi-functional electronic desk calculator Multi-functional electronic desk calculator

1990-04-24

1992-01-07

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 300

Patent

active

050797328

ABSTRACT:
A multi-functional electronic desk calculator has numeral value keys for inputting a numeral value and a decimal point key for inputting a decimal point. The calculator also has a device for detecting depression of the numeral value keys to produce a first signal representative of being in a numeral value inputting mode, a device for detecting depression of the decimal point key to produce a second signal representative of input of the decimal point, a predetermined single key, and a device for operating the predetermined single key as a key used for inputting hexagesimal number when the first signal is produced and the second signal is not produced, and for operating the predetermined single key as a conversion key for performing conversion from decimal number to hexagesimal number when the first signal is not produced or when the second signal is produced.

REFERENCES:
patent: 4059750 (1977-11-01), Dickinson et al.
patent: 4695983 (1987-09-01), Oda et al.
patent: 4935889 (1990-06-01), Harada et al.
Programming for the Sciences, Applications for the Sharp EL-512 Scientific Calculator, Sharp Electronics Corporation, 1983, pp. 16, 30-32.

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