Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1980-07-16

1982-11-09

Feifer, Melvin B.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02668530

REFERENCES:
patent: D225534 (1972-12-01), Jimbo
patent: D255245 (1980-06-01), Yoshioka et al.
patent: D255246 (1980-06-01), Yoshioka et al.

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