Instructional calculator

Details Instructional calculator Instructional calculator

1978-10-17

1980-09-30

Malzahn, David H.

Boots, shoes, and leggings

35 31R, 364419, G06F 1520, G09B 1902

Patent

active

042259320

ABSTRACT:
An electronic calculator is provided with an input keyboard for receiving numerical data, a storage interconnected to the keyboard for storing the received numerical data, processing circuitry interconnected to the storage for processing the numerical data, a display for displaying steps of the arithmetic process of the numerical data, and a visualizing unit for visualizing the numerical data in response to the display. Each step of the arithmetic process of the data may be indicated in the display in response to instructions provided on the keyboard.

REFERENCES:
patent: 3787988 (1974-01-01), Nakajima et al.
patent: 3971924 (1976-07-01), Ozawa et al.
patent: 4016411 (1977-05-01), Genin

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