Control knob for office machines

Details Control knob for office machines Control knob for office machines

1980-10-31

1982-12-14

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Element or attachment

D18 22, D1899

Patent

active

D02672545

REFERENCES:
patent: 3520211 (1970-07-01), Mowery

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