Control knob for an office machine

Details Control knob for an office machine Control knob for an office machine

1981-08-03

1983-05-03

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Element or attachment

D 8312, D18 22, D1899

Patent

active

D02688468

REFERENCES:
patent: D202590 (1965-10-01), Schick
patent: D223798 (1972-06-01), Jensen
patent: D225462 (1972-12-01), Dietrich et al.
patent: 1238261 (1917-08-01), Cavanagh
patent: 2444485 (1948-07-01), Aitcheson
Industrial Design, Apr. 1972, p. 48-Rogan Brothers, Inc., Alpha Knobs at left.

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