Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1985-03-20

1987-04-21

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02894173

REFERENCES:
patent: D265913 (1982-08-01), Yoshioka et al.
patent: D266854 (1982-11-01), Hirata et al.
patent: D268421 (1983-03-01), Hirata et al.
patent: D269354 (1983-06-01), Ishida

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