Double keystroke fraction entry and interface method

Details Double keystroke fraction entry and interface method Double keystroke fraction entry and interface method

1991-01-31

1992-02-18

Mai, Tan V.

Boots, shoes, and leggings

G06F 302

Patent

active

050899805

ABSTRACT:
In a calculating device, a method to allow a user to enter fractions in the form "b/c", where "b" and "c" are integers; "b/c" is a fraction; and the denominator "c" is within a prespecified range. The method to enter real number fractions includes activating one or more digit keys and the successive pressing of a primary function key to distinguish the previously entered numerator value from a subsequently entered denominator value.

REFERENCES:
patent: 4081859 (1978-03-01), Goldsamt et al.
patent: 4488250 (1984-12-01), Lipsey et al.
patent: 4545022 (1985-10-01), Hughins
patent: 4744044 (1988-05-01), Stover et al.

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