Electronic calculator

Details Electronic calculator Electronic calculator

1982-03-15

1984-10-02

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02757702

REFERENCES:
patent: D262140 (1981-09-01), Yamagami et al.
patent: D269355 (1983-06-01), Yamagami
patent: 3978328 (1976-08-01), Fabry et al.
patent: 4190748 (1980-02-01), Langford

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