Money calculator

Details Money calculator Money calculator

1989-05-15

1991-09-24

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03202232

REFERENCES:
patent: D238376 (1976-01-01), Herr et al.
patent: D238951 (1976-02-01), Herr et al.
patent: D291201 (1987-08-01), Weisel, Jr. et al.
patent: 4290708 (1981-09-01), Siwula
patent: 4584709 (1986-04-01), Kneisel et al.
patent: 4715011 (1987-12-01), Brittan

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