Electronic desk calculator

Details Electronic desk calculator Electronic desk calculator

1985-06-05

1987-08-18

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02914506

REFERENCES:
patent: D261528 (1981-10-01), Sakai et al.
patent: 4218755 (1980-08-01), Root

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