Roman numeral electro-optical display

Details Roman numeral electro-optical display Roman numeral electro-optical display

1982-07-09

1985-09-03

Zarfas, Louis S.

Printing and office machinery

Type or type face

Segmented display type

D18 25

Patent

active

D02804190

REFERENCES:
patent: D198605 (1964-07-01), Dickson
patent: 3140548 (1964-07-01), Paparozzi
patent: 3832842 (1974-09-01), Parker
patent: 3971012 (1976-07-01), Morokawa et al.
patent: 4394651 (1983-07-01), Frankston et al.

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