Portable electronic calculator

Details Portable electronic calculator Portable electronic calculator

1983-05-02

1985-07-09

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D14100

Patent

active

D02795809

REFERENCES:
patent: D218785 (1970-09-01), Gore
patent: D257045 (1980-09-01), Ikeda et al.
patent: D264729 (1982-06-01), Kobayashi
patent: D270453 (1983-09-01), Takahashi

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