Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1983-04-18

1985-06-04

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02791072

REFERENCES:
patent: D227671 (1973-07-01), Yamamoto
patent: D228501 (1973-10-01), Yamamoto et al.
patent: D264732 (1982-06-01), Hanzawa
patent: D269875 (1983-07-01), Ishida
patent: 4379336 (1983-04-01), Yamamoto et al.

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