Printing and office machinery – Typewriter or calculator – Calculator
Patent
1986-04-24
1989-01-03
Zarfas, Louis S.
Printing and office machinery
Typewriter or calculator
Calculator
D18 2
Patent
active
D02992523
REFERENCES:
patent: D168191 (1952-11-01), Saksa
patent: D168976 (1953-03-01), Stortz
patent: D279197 (1985-06-01), Chihung
patent: D293751 (1977-03-01), Price et al.
Fanfare Electronics Limited
Zarfas Louis S,.
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