Electronic calculator with check function

Details Electronic calculator with check function Electronic calculator with check function

1983-05-26

1986-04-01

Malzahn, David H.

Boots, shoes, and leggings

364709, G06F 3147

Patent

active

045802351

ABSTRACT:
An electronic calculator with a check function has at least two display parts. A calculating formula inputted with keys is continuously indicated on one display part. At the same time, operated result data corresponding to the data indicated on the one display part is indicated on the remaining display part. Some data of the inputted calculating formula may be amended during the display and replay of the formula, and the corrected final result data is indicated on the display.

REFERENCES:
patent: 4138734 (1979-02-01), Nakata et al.
patent: 4177520 (1979-12-01), Meff
patent: 4217656 (1980-08-01), Hirano et al.
patent: 4301511 (1981-11-01), Shimizu et al.
patent: 4386412 (1983-05-01), Ito

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