Electronic device and method of displaying mathematical expressi

Details Electronic device and method of displaying mathematical expressi Electronic device and method of displaying mathematical expressi

1997-06-25

2000-11-07

Lee, Michael G

Registers

Calculators

Input-output calculator to indicator, printer, etc.

235145R, 708168, G06F 2900

Patent

active

06142367&

ABSTRACT:
The present invention is intended to enable an electronic calculator device for calculating functions to display a mathematical expression by automatically substituting a variable-value into a variable therein in advance. An electronic device comprises an input device for inputting a mathematical expression containing a variable, a store device for storing a value of the variable and a display device for displaying a mathematical expression on a display screen. The electronic device is further provided with a converting device for reading a value for a variable contained in a mathematical expression from the store device and substituting the read-out value into the variable in the mathematical expression to be displayed on the display screen.

REFERENCES:
patent: 3955074 (1976-05-01), Rode et al.
patent: 4810860 (1989-03-01), Sekine
patent: 5245559 (1993-09-01), Lapeyre
patent: 5381353 (1995-01-01), Oba
patent: 5530234 (1996-06-01), Loh et al.
patent: 5557718 (1996-09-01), Tsuneyoshi et al.
patent: 5870319 (1999-02-01), Thornton et al.
"Variable Replacement Processor", Japanese Laid-Open Patent Publication No. 6-119158; Published on Apr. 28, 1994.

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