Computer display for input and display of improper and mixed fra

Details Computer display for input and display of improper and mixed fra Computer display for input and display of improper and mixed fra

1992-07-29

1994-05-03

Malzahn, David H.

Boots, shoes, and leggings

G06F 302

Patent

active

053093801

ABSTRACT:
A calculator keyboard includes various keys such as numeric keys, a mixed fraction key, and a fraction key, a RAM, a ROM and a CPU. A character including a value or variable for a mixed fraction may be input and displayed separately as an integer, a numerator, and a denominator. Any of the characters in the mixed fraction may be edited subsequently. In addition, a fraction may be first input and displayed, and thereafter, an integer of a mixed fraction may be input and displayed. Consequently, unnecessary movement of the cursor is avoided in editing of fractions on the calculator display thereby facilitating easy and efficient operation.

REFERENCES:
patent: 4545022 (1985-10-01), Hughins
patent: 5089980 (1992-02-01), Bunsen et al.
patent: 5138566 (1992-08-01), Comforti

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