Calculating apparatus

Details Calculating apparatus Calculating apparatus

1994-05-27

1995-06-13

Gordon, Paul P.

Boots, shoes, and leggings

36470901, 36470911, G06F 300

Patent

active

054249660

ABSTRACT:
A calculating apparatus having numeral keys, operation keys, a decimal point key and an input information display portion. In this calculating apparatus, when a series of numerical values are input by the respective keys, the decimal point key is controlled so that the decimal point key is in a selection disabled condition after the decimal point key is depressed once. Therefore, the user can know the inoperable condition of the decimal point key and can be protected from mis-operating the keys.

REFERENCES:
patent: 4099246 (1978-07-01), Osborne et al.
patent: 5199104 (1993-03-01), Hirayama
Macintosh System Software User's Guide, Version 6.0 Published in 1988, and the screen printout from a Macintosh system software in operation with a calculator invoked.

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