Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1985-06-26

1987-05-26

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02900190

REFERENCES:
patent: D256695 (1980-09-01), Yamagami
patent: D258740 (1981-03-01), Matsumoto
patent: D269442 (1983-06-01), Nakajima et al.
patent: D273200 (1984-03-01), Sakata
patent: D284771 (1986-07-01), Tamada et al.

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