Pocket calculator

Details Pocket calculator Pocket calculator

1991-01-08

1992-04-14

Hix, L. T.

Registers

Keyboards

Auxiliary

G06C 100

Patent

active

051050684

ABSTRACT:
A pocket calculator for use by two persons simultaneously comprises two keyboards and four displays so that each user can monitor entries and calculations by the other. The calculator is useful in a variety of situations including financial negotiations, crossing checking of calculation, and in a pupil teacher situation.

REFERENCES:
patent: D309749 (1990-08-01), Ido
patent: 4051605 (1977-10-01), Toal et al.
patent: 4808800 (1989-02-01), Nishijima et al.
patent: 4996522 (1991-02-01), Sunand

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