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

D02985489

REFERENCES:
patent: D268423 (1983-03-01), Yoshioka et al.
patent: D289045 (1987-03-01), Brown
patent: D289416 (1987-04-01), Yoshioka et al.
patent: D290018 (1987-05-01), Hirooka et al.
patent: D290019 (1987-05-01), Hirooka et al.
patent: D294151 (1988-02-01), Kuo

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