Calculator with display of processing for mulas as processing pr

Details Calculator with display of processing for mulas as processing pr Calculator with display of processing for mulas as processing pr

1994-07-13

1996-05-21

Malzahn, David H.

Boots, shoes, and leggings

36471003, 36471014, G06F 3147

Patent

active

055196462

ABSTRACT:
The invention provides a calculator wherein it is possible to start an operation on the basis of an inputted formula and successively know the progress processes of operation until an operation result is obtained. An inputted formula edited on the basis of the data inputted from a keyboard is once displayed and the calculator is placed in the state of waiting for key entry. Then, when a Enter key is pressed down, only the operator codes selected among plural operator codes in the inputted formula in accordance with the priority order of operation are processed and a process formula as the result of the processing is displayed. Thereafter, every time the Enter key is pressed down, the operation is executed in accordance with the priority order and the process formulas obtained in the respective operations are successively displayed. Accordingly, the user of the calculator can successively recognize the respective intermediate processes as process formulas as well as the operation result of the inputted formula.

REFERENCES:
patent: 3971924 (1976-07-01), Ozawa et al.
patent: 4181965 (1980-01-01), Olander, Jr. et al
patent: 4225932 (1980-09-01), Hirano et al.
patent: 4386412 (1983-05-01), Ito
patent: 4580235 (1986-04-01), Yanagawa
patent: 4954977 (1990-09-01), Colombat

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