Calculator tray apparatus

Details Calculator tray apparatus Calculator tray apparatus

1980-01-07

1982-03-23

Hix, L. T.

Special receptacle or package

Tray type

With recess or groove for article

235 1R, 235 1D, B65D 134, G06C 502

Patent

active

043208380

ABSTRACT:
Tray apparatus for use in business establishments includes a tray and a calculator for enabling patrons to verify and make arithmetic calculations.

REFERENCES:
patent: 1819755 (1937-08-01), Primos
patent: 2302861 (1942-11-01), Hinkel
patent: 2841899 (1958-07-01), Rengrow
patent: 3103303 (1963-09-01), Lynchey
patent: 3669131 (1972-06-01), Parker
patent: 3674132 (1972-07-01), Loss
patent: 4075702 (1978-02-01), Davies
patent: 4083453 (1978-04-01), Berger et al.

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