Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1986-04-15

1988-11-15

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02985462

REFERENCES:
patent: D256694 (1980-09-01), Kitai
patent: D282853 (1986-03-01), Yoshioka et al.
patent: D289045 (1987-03-01), Brown
patent: D289903 (1987-05-01), Kikuchi et al.

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