Combined typewriter and portable calculator

Details Combined typewriter and portable calculator Combined typewriter and portable calculator

1977-03-18

1979-05-22

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Combined

D1801

Patent

active

D02519321

REFERENCES:
patent: D165550 (1951-12-01), Prouty
patent: D231029 (1974-03-01), Nakanishi
patent: 2963137 (1960-12-01), McDonough et al.
patent: 3675339 (1972-07-01), Lamarca
Addo Catalog #3405/48, printed 1966, p. 25-Accounting/Typing Machine at left.

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