Display apparatus for electronic calculator

Details Display apparatus for electronic calculator Display apparatus for electronic calculator

1984-04-09

1986-09-30

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Element or attachment

D14113

Patent

active

D02859351

REFERENCES:
patent: D238512 (1976-01-01), Boldt
patent: D274727 (1984-07-01), Shibata
patent: D276236 (1984-11-01), Akiyama
patent: D278911 (1985-05-01), Ohnuma et al.

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