Keyboard

Details Keyboard Keyboard

1977-06-15

1979-03-27

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02514346

REFERENCES:
patent: D220132 (1971-03-01), Boothby et al.
Olivetti Catalog #6658, 10/1970, p. 10--Keyboard at bottom right.
Industrial Design, Jan./Feb. 1974, p. 61, Item 3--Braille Typewriter.

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