Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1981-09-28

1983-06-07

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02692783

REFERENCES:
patent: D230404 (1974-02-01), Jimbo
patent: D251272 (1979-03-01), Hazama et al.
patent: D258895 (1981-04-01), Kobayashi
patent: D260530 (1981-09-01), Yamasaki
patent: D261005 (1981-09-01), Ichikawa et al.
HFD-Retailing Home Furnishings, 2/12/79, p. 54, Sanyo Calculator at top right.

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