Electronic calculator

Details Electronic calculator Electronic calculator

1980-07-31

1982-12-28

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02674114

REFERENCES:
patent: D243958 (1977-04-01), Jinbo
Hewlett-Packard Flyer #5952-6077D, 7/1976, front cover-HP67 at right.
Commodore Flyer #C10147, Minuteman 1 Calculator.

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