Design for a handheld calculator

Details Design for a handheld calculator Design for a handheld calculator

1979-03-15

1981-11-10

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02617730

REFERENCES:
patent: D251330 (1979-03-01), Kurosu et al.
patent: 4092527 (1978-05-01), Luecke
patent: 4104728 (1978-08-01), Kasubuchi

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