Electronic desk top calculator

Details Electronic desk top calculator Electronic desk top calculator

1978-05-24

1981-03-31

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02587408

REFERENCES:
patent: D227671 (1973-07-01), Yamamoto
patent: D246205 (1977-10-01), Lewis
patent: D248995 (1978-08-01), Hazama et al.
Home Furnishings Daily, Thurs. 2/13/1975, p. 11-Mini-root calculators at left.

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